HORIZON MEDICAL PRODUCTS INC
SC 13D, 1998-04-27
MEDICAL, DENTAL & HOSPITAL EQUIPMENT & SUPPLIES
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                  SCHEDULE 13D
                   Under the Securities Exchange Act of 1934
                              (Amendment No._____)

                         Horizon Medical Products, Inc.
________________________________________________________________________________
                                (Name of Issuer)

                         Common Stock ($.001 par value)
________________________________________________________________________________
                         (Title of Class of Securities)

                                  439909 10 5
________________________________________________________________________________
                                 (CUSIP Number)
        Mr. Graeme P. Denison, Caledonia Investments plc. Cayzer House,
           1 Thomas More St, London England E1 9AR (44- 171-481-4343)
________________________________________________________________________________
          (Name, Address and Telephone Number of Person Authorized to
                      Receive Notices and Communications)

                                 April 16, 1998
________________________________________________________________________________
            (Date of Event which Requires Filing of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13d, and is filing this
schedule because of Sections 240.13d-1(e),  240.13d-1(f) or 240.13d-1(g),  check
the following box. [ ]

Note:  Schedules  filed in paper format shall include a signed original and five
copies of the schedule,  including all exhibits. See Section 240.13d-7 for other
parties to whom copies are to be sent.

The  remainder  of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).












Potential persons who are to respond to the collection of information  contained
in this form are not  required to respond  unless the form  displays a currently
valid OMB control number.

<PAGE>

CUSIP No. 439909 10 5                                       Page  2 of   14
________________________________________________________________________________

     1.   Names of Reporting Persons.
          I.R.S. Identification Nos. of above persons (entities only).

          Tapir Investments (Bahamas) Ltd.
          .....................................................................
________________________________________________________________________________

     2.   Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  .................................................................

          (b)  .................................................................
________________________________________________________________________________

     3.   SEC Use Only..........................................................
________________________________________________________________________________
                                             WC
     4.   Source of Funds (See Instructions)....................................
________________________________________________________________________________

     5.   Check if Disclosure of Legal Proceedings Is Required Pursuant to Items
          2(d) or 2(e)..........................................................
________________________________________________________________________________
                                                  The Bahamas
     6.   Citizenship or Place of Organization..................................
________________________________________________________________________________

________________________________________________________________________________
                                        -0-
            7.      Sole Voting Power...........................................
Number of   ____________________________________________________________________
Shares Bene-                                           1,109,416
ficially by 8.      Shared Voting Power.........................................
Owned by    ____________________________________________________________________
Each                                        -0-
Reporting   9.      Sole Dispositive Power......................................
Person With ____________________________________________________________________
                                                                       1,109,416
            10.     Shared Dispositive Power....................................
________________________________________________________________________________
                                                                       1,109,416
    11.   Aggregate Amount Beneficially Owned by Each Reporting Person..........
________________________________________________________________________________

    12.   Check if the Aggregate Amount in Row(11) Excludes Certain Shares (See
          Instructions).........................................................
________________________________________________________________________________
                                                                    8.7%  
    13.   Percent of Class Represented by Amount in Row(11).....................
________________________________________________________________________________

    14.   Type of Reporting Person (See Instructions)
                                   CO
          ......................................................................
          ......................................................................
          ......................................................................
          ......................................................................
          ......................................................................

Instructions for Cover Page

(1)  Names and I.R.S. Identification Numbers of Reporting Persons --Furnish  the
     full  legal name of each  person for whom the report is filed - i.e.,  each
     person  required to sign the schedule  itself - including  each member of a
     group. Do not include the name of a person required to be identified in the
     report  but who is not a  reporting  person.  Reporting  persons  that  are
     entities are also requested to furnish their I.R.S. identification numbers,
     although  disclosure  of such  numbers is  voluntary,  not  mandatory  (see
     "SPECIAL INSTRUCTIONS FOR COMPLYING WITH SCHEDULE 13D" below).

(2)  If any of the shares beneficially owned by a reporting person are held as a
     member of a group and the  membership is expressly  affirmed,  please check
     row  2(a).  If the  reporting  person  disclaims  membership  in a group or
     describes  a  relationship  with  other  persons  but does not  affirm  the
     existence  of a group,  please  check row 2(b) [unless it is a joint filing
     pursuant to Rule 13d-1(k)(l) in which case it may not be necessary to check
     row 2(b)].

(3)  The 3rd row is for SEC internal use; please leave blank.

<PAGE>

CUSIP No. 439909 10 5                                       Page  3 of   14
________________________________________________________________________________

     1.   Names of Reporting Persons.
          I.R.S. Identification Nos. of above persons (entities only).

          Caledonia Investments plc
          .....................................................................
________________________________________________________________________________

     2.   Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  .................................................................

          (b)  .................................................................
________________________________________________________________________________

     3.   SEC Use Only..........................................................
________________________________________________________________________________
                                             Not applicable
     4.   Source of Funds (See Instructions)....................................
________________________________________________________________________________

     5.   Check if Disclosure of Legal Proceedings Is Required Pursuant to Items
          2(d) or 2(e)..........................................................
________________________________________________________________________________
                                                  England
     6.   Citizenship or Place of Organization..................................
________________________________________________________________________________

________________________________________________________________________________
                                        -0-
            7.      Sole Voting Power...........................................
Number of   ____________________________________________________________________
Shares Bene-                                           1,109,416
ficially by 8.      Shared Voting Power.........................................
Owned by    ____________________________________________________________________
Each                                        -0-
Reporting   9.      Sole Dispositive Power......................................
Person With ____________________________________________________________________
                                                                       1,109,416
            10.     Shared Dispositive Power....................................
________________________________________________________________________________
                                                                       1,109,416
    11.   Aggregate Amount Beneficially Owned by Each Reporting Person..........
________________________________________________________________________________

    12.   Check if the Aggregate Amount in Row(11) Excludes Certain Shares (See
          Instructions).........................................................
________________________________________________________________________________
                                                                    8.7%  
    13.   Percent of Class Represented by Amount in Row(11).....................
________________________________________________________________________________

    14.   Type of Reporting Person (See Instructions)
                                   CO
          ......................................................................
          ......................................................................
          ......................................................................
          ......................................................................
          ......................................................................

Instructions for Cover Page

(1)  Names and I.R.S. Identification Numbers of Reporting Persons --Furnish  the
     full  legal name of each  person for whom the report is filed - i.e.,  each
     person  required to sign the schedule  itself - including  each member of a
     group. Do not include the name of a person required to be identified in the
     report  but who is not a  reporting  person.  Reporting  persons  that  are
     entities are also requested to furnish their I.R.S. identification numbers,
     although  disclosure  of such  numbers is  voluntary,  not  mandatory  (see
     "SPECIAL INSTRUCTIONS FOR COMPLYING WITH SCHEDULE 13D" below).

(2)  If any of the shares beneficially owned by a reporting person are held as a
     member of a group and the  membership is expressly  affirmed,  please check
     row  2(a).  If the  reporting  person  disclaims  membership  in a group or
     describes  a  relationship  with  other  persons  but does not  affirm  the
     existence  of a group,  please  check row 2(b) [unless it is a joint filing
     pursuant to Rule 13d-1(k)(l) in which case it may not be necessary to check
     row 2(b)].

(3)  The 3rd row is for SEC internal use; please leave blank.

<PAGE>
CUSIP No. 439909 10 5                                       Page  4 of   14
________________________________________________________________________________

     1.   Names of Reporting Persons.
          I.R.S. Identification Nos. of above persons (entities only).

          The Cayzer Trust Company Limited
          .....................................................................
________________________________________________________________________________

     2.   Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  .................................................................

          (b)  .................................................................
________________________________________________________________________________

     3.   SEC Use Only..........................................................
________________________________________________________________________________
                                             Not Applicable
     4.   Source of Funds (See Instructions)....................................
________________________________________________________________________________

     5.   Check if Disclosure of Legal Proceedings Is Required Pursuant to Items
          2(d) or 2(e)..........................................................
________________________________________________________________________________
                                                  England
     6.   Citizenship or Place of Organization..................................
________________________________________________________________________________

________________________________________________________________________________
                                        -0-
            7.      Sole Voting Power...........................................
Number of   ____________________________________________________________________
Shares Bene-                                                1,109,416
ficially by 8.      Shared Voting Power.........................................
Owned by    ____________________________________________________________________
Each                                         -0-  
Reporting   9.      Sole Dispositive Power......................................
Person With ____________________________________________________________________
                                                                       1,109,416
            10.     Shared Dispositive Power....................................
________________________________________________________________________________
                                                                       1,109,416
    11.   Aggregate Amount Beneficially Owned by Each Reporting Person..........
________________________________________________________________________________

    12.   Check if the Aggregate Amount in Row(11) Excludes Certain Shares (See
          Instructions).........................................................
________________________________________________________________________________
                                                                      8.7%
    13.   Percent of Class Represented by Amount in Row(11).....................
________________________________________________________________________________

    14.   Type of Reporting Person (See Instructions)
                                    CO
          ......................................................................
          ......................................................................
          ......................................................................
          ......................................................................
          ......................................................................

Instructions for Cover Page

(1)  Names and I.R.S. Identification Numbers of Reporting Persons --Furnish  the
     full  legal name of each  person for whom the report is filed - i.e.,  each
     person  required to sign the schedule  itself - including  each member of a
     group. Do not include the name of a person required to be identified in the
     report  but who is not a  reporting  person.  Reporting  persons  that  are
     entities are also requested to furnish their I.R.S. identification numbers,
     although  disclosure  of such  numbers is  voluntary,  not  mandatory  (see
     "SPECIAL INSTRUCTIONS FOR COMPLYING WITH SCHEDULE 13D" below).

(2)  If any of the shares beneficially owned by a reporting person are held as a
     member of a group and the  membership is expressly  affirmed,  please check
     row  2(a).  If the  reporting  person  disclaims  membership  in a group or
     describes  a  relationship  with  other  persons  but does not  affirm  the
     existence  of a group,  please  check row 2(b) [unless it is a joint filing
     pursuant to Rule 13d-1(k)(l) in which case it may not be necessary to check
     row 2(b)].

(3)  The 3rd row is for SEC internal use; please leave blank.
<PAGE>

CUSIP No. 439909 10 5                                       Page  5 of   14
________________________________________________________________________________

     1.   Names of Reporting Persons.
          I.R.S. Identification Nos. of above persons (entities only).

          Sterling Industries PLC
          .....................................................................
________________________________________________________________________________

     2.   Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)  .................................................................

          (b)  .................................................................
________________________________________________________________________________

     3.   SEC Use Only..........................................................
________________________________________________________________________________
                                             Not applicable
     4.   Source of Funds (See Instructions)....................................
________________________________________________________________________________

     5.   Check if Disclosure of Legal Proceedings Is Required Pursuant to Items
          2(d) or 2(e)..........................................................
________________________________________________________________________________
                                                  England
     6.   Citizenship or Place of Organization..................................
________________________________________________________________________________

________________________________________________________________________________
                                        -0-
            7.      Sole Voting Power...........................................
Number of   ____________________________________________________________________
Shares Bene-                                           1,109,416
ficially by 8.      Shared Voting Power.........................................
Owned by    ____________________________________________________________________
Each                                        -0-
Reporting   9.      Sole Dispositive Power......................................
Person With ____________________________________________________________________
                                                                       1,109,416
            10.     Shared Dispositive Power....................................
________________________________________________________________________________
                                                                       1,109,416
    11.   Aggregate Amount Beneficially Owned by Each Reporting Person..........
________________________________________________________________________________

    12.   Check if the Aggregate Amount in Row(11) Excludes Certain Shares (See
          Instructions).........................................................
________________________________________________________________________________
                                                                    8.7%  
    13.   Percent of Class Represented by Amount in Row(11).....................
________________________________________________________________________________

    14.   Type of Reporting Person (See Instructions)
                                   CO
          ......................................................................
          ......................................................................
          ......................................................................
          ......................................................................
          ......................................................................

Instructions for Cover Page

(1)  Names and I.R.S. Identification Numbers of Reporting Persons --Furnish  the
     full  legal name of each  person for whom the report is filed - i.e.,  each
     person  required to sign the schedule  itself - including  each member of a
     group. Do not include the name of a person required to be identified in the
     report  but who is not a  reporting  person.  Reporting  persons  that  are
     entities are also requested to furnish their I.R.S. identification numbers,
     although  disclosure  of such  numbers is  voluntary,  not  mandatory  (see
     "SPECIAL INSTRUCTIONS FOR COMPLYING WITH SCHEDULE 13D" below).

(2)  If any of the shares beneficially owned by a reporting person are held as a
     member of a group and the  membership is expressly  affirmed,  please check
     row  2(a).  If the  reporting  person  disclaims  membership  in a group or
     describes  a  relationship  with  other  persons  but does not  affirm  the
     existence  of a group,  please  check row 2(b) [unless it is a joint filing
     pursuant to Rule 13d-1(k)(l) in which case it may not be necessary to check
     row 2(b)].

(3)  The 3rd row is for SEC internal use; please leave blank.


<PAGE>

CUSIP No. 439909 10 5                                               Page 6 of 14

                                  SCHEDULE 13D

            UNDER THE SECURITIES AND EXCHANGE COMMISSION ACT OF 1934

ITEM 1.  SECURITY AND ISSUER

         This Statement  relates to the Common Stock ($.001 par value)  ("Common
Stock")  of  Horizon  Medical  Products,  Inc.  (the  "Issuer").  The  principal
executive offices of the Issuer are located at One Horizon Way, P.O. Drawer 627,
Manchester, Georgia 31816.

ITEM 2.  IDENTITY AND BACKGROUND

         The persons  filing  this  Statement  (the  "Reporting  Persons"),  the
persons  enumerated in Instruction C of Schedule 13D (the "Additional  Persons")
and  where  applicable,  their  respective  places of  organization,  directors,
executive  officers and controlling  persons,  and the information in respect of
such persons, are as follows:

         (A) This  Statement is filed by (i) Tapir  Investments  (Bahamas)  Ltd.
("Tapir")  as the  direct  beneficial  owner  of  the  Common  Stock  previously
referenced on pages 2 through 5; (ii) Caledonia Investments plc ("Caledonia") as
an indirect  beneficial  owner of this Common Stock given that  Caledonia is the
holder of all of the  outstanding  capital stock of Tapir;  and (iii) The Cayzer
Trust Company Limited ("Cayzer Trust") and Sterling  Industries PLC ("Sterling")
as indirect  beneficial  owners of this Common Stock given that their respective
direct holdings of the securities of Caledonia  represent  indirect  holdings of
the  stock  of  Tapir  (collectively  all  these  entities  are  the  "Reporting
Persons").

         Tapir is the  direct  beneficial  holder of  approximately  8.7% of the
outstanding  Common  Stock of the Issuer.  Caledonia is the holder of all of the
outstanding  capital stock of Tapir. Cayzer Trust holds 27.2% of the outstanding
common stock of Caledonia and 45.4% of the outstanding common stock of Sterling.
Sterling  holds 9.7% of the  outstanding  common stock of  Caledonia.  Together,
Cayzer Trust and Sterling may be deemed to control Caledonia and, hence,  Tapir.
Cayzer Trust and Sterling disclaim beneficial ownership of Caledonia or Tapir.

         (B) The principal  business  address of Tapir is Sandringham  House, 83
Shirley  Street,  P.O. Box N-3247,  Nassau,  New  Providence,  The Bahamas.  The
principal  business address for both Caledonia and Cayzer Trust is Cayzer House,
1 Thomas More Street,  London, England E1 9AR. The principal business address of
Sterling is Sterling House, Crewkerne, Somerset, England TA18 8LL. The addresses
of the officers and directors of the Reporting Persons are set forth on Schedule
A hereto and are incorporated herein by reference.

         Tapir is an investment holding company.

         Caledonia is a diversified trading and investment company.


<PAGE>

CUSIP No. 439909 10 5                                               Page 7 of 14

         Cayzer Trust is an investment holding company.

         Sterling is an engineering company.

         (C) Certain additional  information about the officers and directors of
the  Reporting  Persons is set forth on  Schedule  A hereto and is  incorporated
herein by reference.

         (D) During the last five years,  neither any  Reporting  Person nor any
Additional Persons,  according to any of the Reporting Person's knowledge,  have
been convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors).

         (E) During the last five years,  neither any Reporting Person,  nor any
of the Additional Persons, according to any of the Reporting Person's knowledge,
have been a party to a civil proceeding of a judicial or administrative  body of
competent jurisdiction and as a result of such proceeding was or is subject to a
judgment,  decree, or final order enjoining future violations of, or prohibiting
or mandating  activities subject to, federal or state securities laws or finding
any violation with respect to such laws.

         (F) Tapir is a  corporation  organized  under the laws of The  Bahamas.
Caledonia,  Cayzer Trust and Sterling are corporations  organized under the laws
of England.  Each of the Additional  Persons is a citizen of The United Kingdom,
except for S. Deal, P.C.  Dunkley,  P.T. Higgs and H.T. Lunn who are citizens of
The Bahamas.

ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

         On April 16 and 17, 1998,  Tapir  utilized  existing cash  resources to
acquire a total of 100,000  shares of Common  Stock in the market.  On April 14,
1998,  Tapir  utilized  existing cash  resources to purchase  300,000  shares of
Common Stock in the initial public  offering.  Prior to and concurrent  with the
initial public offering, as previously disclosed by the April 15, 1998 filing of
the Issuer  pursuant to Rule 424(b)(4)  under  Registration  Number  333-464349,
Tapir utilized existing cash resources to acquire 734,416 shares of Common Stock
from certain shareholders of the Issuer in privately negotiated transactions. On
April 16,  1998,  Tapir sold  25,000 of the  shares of Common  Stock that it had
purchased  in  the  initial  public  offering  to  an  individual  in a  private
transaction.

ITEM 4.  PURPOSE OF TRANSACTION

         The  purpose  of the  acquisition  of the  Common  Stock by Tapir is to
acquire and maintain an equity  interest in the Issuer for investment  purposes.
Any Reporting Person, may, from time to time, increase, reduce or dispose of its
investment in the Issuer,  depending on general  economic  conditions,  economic
conditions in the markets in which the Issuer operates,  the market price of the
Common Stock of the Issuer,  the availability of funds,  borrowing costs,  other

<PAGE>

CUSIP No. 439909 10 5                                               Page 8 of 14

opportunities  available to the Reporting  Person,  the  strategic  value of the
investment to the Reporting Person and other considerations.

ITEM 5.  INTEREST IN SECURITIES OF ISSUER

         (A) Tapir is the direct  beneficial owner of 1,109,416 shares of Common
Stock of the Issuer.

         This holding  represents  approximately 8.7% of the total of 12,800,000
shares of Common Stock currently  outstanding according to Form S-1 Registration
Statement  of the Issuer and the  amendments  thereto  filed under  Registration
Number  333-464349  ("Issuer   Registration   Statement").   By  virtue  of  the
relationships  described in Item 2, the other Reporting Persons may be deemed to
share indirect beneficial ownership of the shares of Common Stock owned directly
by Tapir. Cayzer Trust and Sterling disclaim all such beneficial ownership.

         (B) Tapir has the direct  power to vote and direct the  disposal of the
shares of Common Stock of the Issuer.

         (C) Except as disclosed above in response to Item 3, there have been no
transactions in shares of Common Stock by any Reporting Person.

         (D) Tapir has the right to receive  and the power to direct  receipt of
dividends from the  shares of Common Stock of the Issuer that it holds.

         (E) Not applicable.

ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
SECURITIES OF THE ISSUER

         As   previously   disclosed  by  Amendment   Number  4  to  the  Issuer
Registration  Statement  filed on April 14,  1998,  the  Issuer  granted  Tapir,
pursuant  to an April 9, 1998  Rights  Agreement,  certain  demand  registration
rights, exercisable after September 30, 1999, and certain piggyback registration
rights  relating  to shares of Common  Stock that Tapir  acquired  in  privately
negotiated  transactions  with certain  shareholders of the Issuer. In addition,
pursuant to a Loan and Pledge  Agreement dated April 9, 1998,  between Tapir and
Marshall B. Hunt,  Tapir agreed to loan funds to Mr. Hunt,  and Mr. Hunt granted
Tapir certain  co-sale or "tag-along"  rights in the event that Mr. Hunt desires
to sell a  significant  portion  of his  shares  of  Common  Stock in a  private
transaction.

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS

         Not applicable.


<PAGE>

CUSIP No. 439909 10 5                                               Page 9 of 14

                                   SIGNATURES

         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.

April 27, 1998                      TAPIR INVESTMENTS (BAHAMAS) LTD.


                                     By:  
                                          --------------------------------------
                                          S. Deal, Director and Secretary

April 27, 1998                      CALEDONIA INVESTMENTS PLC


                                     By:  
                                          --------------------------------------
                                          G. P. Denison, Secretary

April 27, 1998                      THE CAYZER TRUST COMPANY LIMITED


                                     By:  
                                          --------------------------------------
                                          J.I. Mehrtens, Director

April 27, 1998                      STERLING INDUSTRIES PLC


                                     By:  
                                          --------------------------------------
                                          J.H. Cartwright, Director


<PAGE>

CUSIP No. 439909 10 5                                              Page 10 of 14

                           SCHEDULE A TO SCHEDULE 13D

(I)  DIRECTORS AND OFFICERS OF TAPIR INVESTMENTS (BAHAMAS) LTD.

<TABLE>
<CAPTION>
<S>                           <C>                         <C>                               <C>                               
NAME                          RESIDENCE                   PRINCIPAL OCCUPATION              CITIZENSHIP


P. N. Buckley                 6 Albert Place              Chairman and Chief Executive      United Kingdom
                              London                      Caledonia Investments plc
                              W8 5PD, England

Hon. C. W. Cayzer             Finstock Manor              Executive Director                United Kingdom
                              Finstock                    Caledonia Investments plc
                              Oxfordshire
                              OX7 3DG, England

S. Deal                       Sandringham House           Lawyer                            Bahamas
                              83 Shirley House
                              P.O. Box N-3247
                              Nassau, Bahamas

P. C. Dunkley                 Sandringham House           Lawyer                            Bahamas
                              83 Shirley House
                              P.O. Box N-3247
                              Nassau, Bahamas

P. T. Higgs                   Sandringham House           Lawyer                            Bahamas
                              83 Shirley House
                              P.O. Box N-3247
                              Nassau, Bahamas

H. T. Lunn                    Sandringham House           Legal Assistant                   Bahamas
                              83 Shirley House
                              P.O. Box N-3247
                              Nassau, Bahamas
</TABLE>



<PAGE>

CUSIP No. 439909 10 5                                              Page 11 of 14


(II)  DIRECTORS AND EXECUTIVE OFFICERS OF CALEDONIA INVESTMENTS, PLC

<TABLE>
<CAPTION>
<S>                           <C>                         <C>                               <C>                                  
NAME                          RESIDENCE                   PRINCIPAL OCCUPATION              CITIZENSHIP


P.N. Buckley                  6 Albert Place              Chairman and Chief Executive      United Kingdom
                              London                      Caledonia Investments plc
                              W8 5PD, England

J. Burnett-Stuart             Ardmeallie House            Retired                           United Kingdom
                              Huntley
                              Aberdeenshire
                              AB54 5RS, Scotland

J. H. Cartwright              Rectory Meadow              Finance Director                  United Kingdom
                              Hawthorn Place, Penn        Caledonia Investments plc
                              Buckinghamshire
                              HP10 8EH, England

Lord Cayzer                   The Grove                   President                         United Kingdom
                              Walsham-le-Willows          Caledonia Investments plc
                              Suffolk, England

N. K. Cayzer                  Thriepley House             Chairman                          United Kingdom
                              Lundie, Dundee              Oriel Group plc
                              Scotland                    Stuart House
                                                          Queens Gate
                                                          Britannia Road
                                                          Waltham Cross
                                                          Hertfordshire, EN8 7TF
                                                          England

Hon. C. W. Cayzer             Finstock Manor              Executive Director                United Kingdom
                              Finstock                    Caledonia Investments plc
                              Oxfordshire
                              OX7 3DG, England

G. P. Denison                 16 Highfield Road           Company Secretary                 United Kingdom
                              Hertford                    Caledonia Investments plc
                              Hertfordshire
                              SG13 8BH, England

</TABLE>



<PAGE>

CUSIP No. 439909 10 5                                              Page 12 of 14


<TABLE>
<CAPTION>
<S>                           <C>                         <C>                               <C>                               
Sir David Kinloch             29 Walpole Street           Deputy Chief Executive            United Kingdom
                              London, SW3 4QS             Caledonia Investments plc
                              England

J. R. H. Loudon               Olantigh                    Finance Director                  United Kingdom
                              Wye                         Blue Circle Industries PLC
                              Ashford                     84 Eccleston Square
                              Kent, England               London, SW1V 1PX
                              TN25 5EW                    England

M. G. Wyatt                   Pippin Park                 Deputy Chairman                   United Kingdom
                              Lidgate, Newmarket          Caledonia Investments plc
                              Suffolk
                              CB8 9PP, England

(III)  DIRECTORS AND EXECUTIVE OFFICERS OF THE CAYZER TRUST COMPANY LIMITED


<CAPTION>
NAME                          RESIDENCE                   PRINCIPAL OCCUPATION              CITIZENSHIP
<S>                           <C>                         <C>                               <C>                                  
G. A. Adkin                   Marsh Farm Cottage          Retired                           United Kingdom
                              Mapperton,
                              Beaminster
                              Dorset DT8 3NP
                              England

P. N. Buckley                 6 Albert Place              Chairman and Chief                United Kingdom
                              London                      Executive, Caledonia
                              W8 5PD, England             Investments plc      


Lord Cayzer                   The Grove                   President                         United Kingdom
                              Walsham-le-Willows          Caledonia Investments plc
                              Suffolk, England

Hon. C. W. Cayzer             Finstock Manor              Executive Director                United Kingdom
                              Finstock                    Caledonia Investments plc
                              Oxfordshire 
                              OX7 3DG, England
</TABLE>


<PAGE>

CUSIP No. 439909 10 5                                              Page 13 of 14

<TABLE>
<CAPTION>
<S>                           <C>                         <C>                               <C>                                
Sir James Cayzer              Kinpurnie Castle            Landowner                         United Kingdom
                              Newtyle, Angus
                              Scotland

The Hon. Mrs. N. Colvin       Tangley House,              None                              United Kingdom
                              Andover
                              Hampshire
                              SP11 OSH, England

J. I. Mehrtens                51 Oxenden Wood             Company Secretary of              United Kingdom
                              Road                        The Cayzer Trust Company 
                              Chelsfield Park             Limited
                              Orpington,
                              Kent BR6 6HP,
                              England

M. G. Wyatt                   Pippin Park                 Deputy Chairman                   United Kingdom
                              Lidgate, Newmarket          Caledonia Investments plc
                              Suffolk
                              CB8 9PP, England


(IV) DIRECTORS AND EXECUTIVE OFFICERS OF STERLING INDUSTRIES PLC


<CAPTION>
<S>                           <C>                         <C>                               <C>                               
NAME                          RESIDENCE                   PRINCIPAL OCCUPATION              CITIZENSHIP

D. Blunn                      The Barn, Park Farm         Finance Director                  United Kingdom
                              Marston Magna               Sterling Industries PLC
                              Somerset
                              TA22 8AX,England

P. N. Buckley                 6 Albert Place              Chairman and Chief Executive      United Kingdom
                              London                      Caledonia Investments plc
                              W8 5PD, England

J. H. Cartwright              Rectory Meadow              Finance Director                  United Kingdom
                              Hawthorn Place, Penn,       Caledonia Investments plc
                              Buckinghamshire
                              HP10 8EH, England
</TABLE>

<PAGE>


CUSIP No. 439909 10 5                                              Page 14 of 14

<TABLE>
<CAPTION>
<S>                           <C>                         <C>                               <C>
H. W. Denman                  The Penthouse               Retired                           United Kingdom
                              Old Avenue
                              St. Georges Hill
                              Weybridge
                              Surrey, KT13 OQB
                              England

D. Diggins                    Fairgarden                  Chief Executive                   United Kingdom
                              Unity Lane                  Sterling Industries PLC
                              Misterton, Crewkerne
                              Somerset TA18 5NA
                              England

Sir David Kinloch             29 Walpole Street           Deputy Chief Executive            United Kingdom
                              London, SW3 4QS             Caledonia Investments plc
                              England              

M. G. Wyatt                   Pippin Park                 Deputy Chairman                   United Kingdom
                              Lidgate, Newmarket          Caledonia Investments plc
                              Suffolk
                              CB8 9PP, England
</TABLE>


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