Substantial Holder Int Change

BHP Billiton Limited
19 April 2005

     BHP Billiton Limited is issuing this announcement to fulfil disclosure
  obligations arising from its secondary listing on the London Stock Exchange.

    The text of this release is identical to that issued by BHP Billiton Plc
                                    earlier.


19 April 2005

To:                                            cc:
Company Announcements Office                   Ms Sarah Calvert/Heron Resources Ltd
The Australian Stock Exchange                  New York Stock Exchange
4th Floor, 20 Bridge Street                    Swiss Stock Exchange
Sydney NSW 2000                                Johannesburg Stock Exchange
Australia                                      Deutsche Bank

London Stock Exchange                          UBS Zurich
Old Broad Street
London EC2N 1HP
United Kingdom


              Notice of Change of Interests of Substantial Holder

In accordance with Chapter 6C of the Corporations Act 2001 (Cwth), BHP Billiton
issues the attached ASIC Form 604 (Notice of Change of Interests of Substantial
Holder) in relation to the ordinary shares in Heron Resources Ltd (Heron
Resources).

Yours sincerely

Ross Mallett
Deputy Company Secretary


                              Form 604
                      Corporations Act 2001
                           Section 671B
          Notice of change of interests of substantial holder


To Company Name/Scheme     Heron Resources Limited

ACN/ARSN                   30 068 263 098

1. Details of substantial holder (1)

Name                       BHP Billiton Limited
ACN/ARSN (if applicable)   49 004 028 077

This notice is also given by BHP Billiton Limited on behalf of BHP Billiton Plc and on behalf of BHP Billiton
Limited's controlled bodies corporate (Subsidiaries) and on behalf of BHP Billiton Plc's controlled bodies
corporate including those named in Annexure A of the Form 603 'Notice of initial substantial holder' dated 8 April
2005

There was a change in the interests
of the
substantial holder on                   15/04/2005
The previous notice was given to the    8/04/2005
company on
The previous notice was dated           8/04/2005

2. Previous and present voting power

The total number of votes attached to all the voting shares in the company or voting interests in the scheme that
the substantial holder or an associate (2) had a
relevant interest (3) in when last required, and when now required, to give a substantial holding notice to the
company or scheme, are as follows:

            Class of securities  Previous notice                              Present notice
            (4)                  Person's votes          Voting power (5)     Person's votes    Voting power
                                                                                                (5)
            Ordinary shares      15 890 310              15 890 310           15 890 310        9.99%

3. Changes in relevant interests

Particulars of each change in, or change in the nature of, a relevant interest of the substantial holder or an
associate in voting securities of the company or
scheme, since the substantial holder was last required to give a substantial holding notice to the company or
scheme are as follows:

      Date of    Person whose     Nature of               Consideration       Class and     Person's votes
      change     relevant         change (6)              given in relation   number of     affected
                 interest                                 to change (7)       securities
                 changed                                                      affected

      15/04/2005 BHP Minerals     Holding diluted as a    NA                  15 890 310    15 890 310
                 Holdings Pty Ltd consequence of issue of                     ordinary
                 ACN 005 744 025  new shares by Heron                         shares
                                  Resources Ltd on 15
                                  April 2005
      15/04/2005 BHP Billiton     Taken under section 608 Nil                 As above for  As above for BHP
                 Limited          (3)(b) of the                               BHP Minerals  Minerals Holdings
                                  Corporations Act to                         Holdings Pty  Pty Ltd
                                  have a relevant                             Ltd
                                  interest by reason of
                                  having control of BHP
                                  Minerals Holdings Pty
                                  Ltd
      15/04/2005 Each of the      Taken under section 608 Nil                 As above for  As above for BHP
                 Subsidiaries     (3)(a) of the                               BHP Minerals  Minerals Holdings
                                  Corporations Act to                         Holdings Pty  Pty Ltd
                                  have a relevant                             Ltd
                                  interest by reason of
                                  having voting power
                                  (through the relevant
                                  interests of its
                                  associate, BHP Billiton
                                  Limited) above 20% in
                                  BHP Minerals Holdings
                                  Pty Ltd

4. Present relevant interests

Particulars of each relevant interest of the substantial holder in voting securities after the change are as
follows:

  Holder of    Registered Person     Nature of                                       Class and    Person's
  relevant     holder of  entitled   relevant                                        number of    votes
  interest     securities to be      interest (6)                                    securities
                          registered
                          as holder
                          (8)
  BHP Minerals BHP        BHP        Power to control disposal of the securities     15 890 310   15 890 310
  Holding Pty  Minerals   Minerals   pursuant to the contracts referred to in        ordinary
  Ltd          Holdings   Holdings   paragraph 3                                     shares
               Pty Ltd    Pty Ltd
  BHP Billiton BHP        BHP        Taken under section 608(3)(b) of the            As above for As above for
  Limited      Minerals   Minerals   Corporations Act to have a relevant interest by BHP Minerals BHP Minerals
               Holdings   Holdings   reason of having control BHP Minerals Holdings  Holdings Pty Holdings Pty
               Pty Ltd    Pty Ltd    Pty Ltd                                         Ltd          Ltd
  Each of the  BHP        BHP        Taken under section 608(3)(a) of the            As above BHP As above for
  Subsidiaries Minerals   Minerals   Corporations Act to have a relevant interest by Minerals     BHP Minerals
               Holdings   Holdings   reason of having voting power (through the      Holdings Pty Holdings Pty
               Pty Ltd    Pty Ltd    relevant interests of its associate, BHP        Ltd          Ltd
                                     Billiton Limited) above 20% in BHP Minerals
                                     Holdings Pty Ltd



5. Changes in association

The persons who have become associates (2) of, ceased to be associates of, or have changed the nature of their
association (9) with, the substantial holder in
relation to voting interests in the company or scheme are as follows:

             Name and ACN/ARSN (if        Nature of association
             applicable)
             Not applicable               Not applicable




6. Addresses

The addresses of persons named in this form are as follows:

             Name                         Address
             BHP Billiton Limited and     C/- BHP BIlliton Limited
             each other person on whose   180 Lonsdale Street, Melbourne, Victoria 3000
             behalf this notice is given

Signature

print name                  Ross Mallett                                             capacity  Deputy Company
                                                                                               Secretary
sign here                                                                            date      19/04/2005

                                       DIRECTIONS


(1) If there are a number of substantial holders with similar or related relevant interests (eg. a corporation
    and its related corporations, or the manager and trustee of an equity trust), the names could be included in
    an annexure to the form. If the relevant interests of a group of persons are essentially similar, they may
    be referred to throughout the form as a specifically named group if the membership of each group, with the
    names and addresses of members is clearly set out in paragraph 6 of the form.

(2) See the definition of 'associate' in section 9 of the Corporations Act 2001.

(3) See the definition of 'relevant interest' in sections 608 and 671B(7) of the Corporations Act 2001.

(4) The voting shares of a company constitute one class unless divided into separate classes.

(5) The person's votes divided by the total votes in the body corporate or scheme multiplied by 100.

(6) Include details of:
    (a) any relevant agreement or other circumstances because of which the change in relevant interest occurred.
        If subsection 671B(4) applies, a copy of any document setting out the terms of any relevant agreement,
        and a statement by the person giving full and accurate details of any contract, scheme or arrangement,
        must accompany this form, together with a written statement certifying this contract, scheme or
        arrangement; and
    (b) any qualification of the power of a person to exercise, control the exercise of, or influence the
        exercise of, the voting powers or disposal of the securities to which the relevant interest relates
        (indicating clearly the particular securities to which the qualification applies).
    See the definition of 'relevant agreement' in section 9 of the Corporations Act 2001.

(7) Details of the consideration must include any and all benefits, money and other, that any person from whom a
    relevant interest was acquired has, or may, become entitled to receive in relation to that acquisition.
    Details must be included even if the benefit is conditional on the happening or not of a contingency.
    Details must be included on any benefit paid on behalf of the substantial holder or its associate in
    relation to the acquisitions, even if they are not paid directly to the person from whom the relevant
    interest was acquired.

(8) If the substantial holder is unable to determine the identity of the person (eg. if the relevant interest
    arises because of an option) write 'unknown''.

(9) Give details, if appropriate, of the present association and any change in that association since the last
    substantial holding notice.

BHP Billiton Limited ABN 49 004 028 077                BHP Billiton Plc Registration number 3196209
Registered in Australia                                Registered in England and Wales
Registered Office: Level 27, 180 Lonsdale Street       Registered Office: Neathouse Place London SW1V 1BH
Melbourne Victoria 3000                                United Kingdom
Telephone [phone] Facsimile [phone]   Telephone [phone] Facsimile [phone]
                                                                 

                 The BHP Billiton Group is headquartered in Australia


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