REG-ABN AMRO BANK N.V. EPT Disclosure

LONDON--(Business Wire)--

FORM 38.5(b)

DEALINGS BY CONNECTED EXEMPT PRINCIPAL TRADERS

WITHOUT RECOGNISED INTERMEDIARY STATUS, OR WITH RI STATUS

BUT NOT DEALING IN A CLIENT-SERVING CAPACITY

(Rule 38.5(b) of the Takeover Code)

1. KEY INFORMATION

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Name of exempt principal trader ABN AMRO BANK N.V. London Branch (Subsidiary of RFS Holding
N.V.)
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Company dealt in BHP Billiton Plc
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Class of relevant security to which the ORD 0.50 USD
dealings being disclosed relate (Note 1)
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Date of dealing 4 September 2008
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2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a) Interests and short positions (following dealing) in the class of relevant
security dealt in (Note 2)

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Long Short
------------------------------------------ ------------------------------ --------------------------------
Number (%) Number (%)
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(1) Relevant securities 5,390,543 (0.2442%) 1,021,534 (0.0463%)
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(2) Derivatives (other than options) 6,000 (0.0003%) 87,903 (0.0040%)
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(3) Options and agreements to
purchase/sell 200,000 (0.0091%) 781,000 (0.0354%)
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Total 5,596,543 (0.2536%) 1,890,437 (0.0857%)
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(b) Interests and short positions in relevant securities of the company, other
than the class dealt in (Note 2)

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Class of relevant security: Long Short
------------------------------------------ ------------------------------ --------------------------------
Number (%) Number (%)
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(1) Relevant securities 0 (0%) 0 (0%)
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(2) Derivatives (other than options) 0 (0%) 0 (0%)
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(3) Options and agreements to
purchase/sell 0 (0%) 0 (0%)
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Total 0 (0%) 0 (0%)
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(c) Rights to subscribe (Note 2)

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Class of relevant security: Details
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3. DEALINGS (Note 3)

(a) Purchases and sales

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Purchase/sale Number of securities Price per unit (Note 4)
----------------------------------- ---------------------------------- ------------------------------------
Purchase 17,900 14.8581 GBP
Purchase 1,764 14.9200 GBP
Purchase 83,868 14.9269 GBP
Purchase 4,736 14.9300 GBP
Purchase 12,000 15.0200 GBP
Purchase 8,000 15.0800 GBP
Purchase 115,000 15.0986 GBP
Purchase 15,000 15.3300 GBP
Purchase 3,861 15.4018 GBP
Purchase 693 15.6000 GBP
TOTAL 262,822

Sale 17,900 14.8600 GBP
Sale 12,534 14.8900 GBP
Sale 22,916 14.9000 GBP
Sale 5,467 14.9100 GBP
Sale 5,449 14.9200 GBP
Sale 83,868 14.9269 GBP
Sale 6,500 14.9273 GBP
Sale 1,909 14.9300 GBP
Sale 10,422 14.9500 GBP
Sale 12,225 14.9600 GBP
Sale 9,695 14.9800 GBP
Sale 3,251 14.9900 GBP
Sale 115,000 15.0133 GBP
Sale 19,300 15.0200 GBP
Sale 700 15.0300 GBP
Sale 535 15.0800 GBP
Sale 10,000 15.1700 GBP
Sale 442 15.2500 GBP
Sale 702 15.3300 GBP
Sale 518 15.3600 GBP
Sale 438 15.4000 GBP
Sale 5,033 15.4200 GBP
Sale 4,967 15.4300 GBP
Sale 693 15.6000 GBP
Sale 605 15.6100 GBP
Sale 2,230 15.6200 GBP
Sale 621 15.7300 GBP
Sale 8,500 15.7500 GBP
Sale 3,201 15.6200 GBP
TOTAL 365,621
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(b) Derivatives transactions (other than options)

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Product name, Long/short (Note 5) Number of securities (Note 6) Price per unit (Note 4)
e.g. CFD
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Jun 2009 Call Warrant Long 80 0.5900 EUR
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(c) Options transactions in respect of existing securities

(i) Writing, selling, purchasing or varying

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Product name, Writing, Number of Exercise Type, e.g. Expiry Option money
e.g. call option selling, securities to price American, date paid/received
purchasing, which the option European per unit
varying etc. relates (Note 6) etc. (Note 4)
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(ii) Exercising

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Product name, e.g. call option Number of securities Exercise price per unit (Note 4)
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(d) Other dealings (including new securities) (Note 3)

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Nature of transaction (Note 7) Details Price per unit (if applicable) (Note
4)
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4. OTHER INFORMATION

Agreements, arrangements or understandings relating to options or derivatives

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Full details of any agreement, arrangement or understanding between the person disclosing and any other
person relating to the voting rights of any relevant securities under any option referred to on this
form or relating to the voting rights or future acquisition or disposal of any relevant securities to
which any derivative referred to on this form is referenced. If none, this should be stated.
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Is a Supplemental Form 38.5(b) attached? (Note 8) YES/NO

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Date of disclosure 5 September 2008
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Contact name Fraser Wyeth
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Telephone number (020) 7678 0480
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Name of offeree/offeror with which connected Rio Tinto Plc
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Nature of connection (Note 9) Advisor
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Notes: The Notes on Form 38.5(b) can be viewed on the Takeover Panel's website
at www.thetakeoverpanel.org.uk

SUPPLEMENTAL FORM 8

DETAILS OF OPEN POSITIONS

(This form should be attached to Form 8.1, Form 8.1(b)(ii) or Form 8.3, as
appropriate)

OPEN POSITIONS (Note 1)

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Product name, Written or Number of Exercise price Type, e.g. Expiry date
e.g. call option purchased securities to (Note 2) American,
which the option European
or derivative etc.
relates
------------------------ ------------- ----------------- --------------- ------------- ---------------------
Dec 2010 Call Option Purchase 100,000 16.3500 GBP Euro 17-Dec-10
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Dec 2010 Put Option Written 100,000 16.3500 GBP Euro 17-Dec-10
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Sep 2008 Put Option Purchased 300,000 13.0000 GBP American 19-Sep-08
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Sep 2008 Call Option Written 300,000 17.0000 GBP American 19-Sep-08
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June 2009 Put Option Purchased 1,000 12.000 GBP American 19-Jun-09
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Notes

1. Where there are open option positions or open derivative positions (except
for CFDs), full details should be given. Full details of any existing agreements
to purchase or to sell should also be given on this form.

2. For all prices and other monetary amounts, the currency must be stated.

For details of the Code's dealing disclosure requirements, see Rule 8 and its
Notes which can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk

ABN AMRO BANK N.V.

Copyright Business Wire 2008