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 26 August 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
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Number (%) Number (%)
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(1) Relevant securities 4,783,324 (0.2167%) 773,779 (0.0351%)
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(2) Derivatives (other than options) 6,000 (0.0003%) 84,574 (0.0038%)
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(3) Options and agreements to
purchase/sell 200,000 (0.0091%) 781,000 (0.0354%)
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Total 4,989,324 (0.2261%) 1,639,353 (0.743%)
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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
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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)
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Purchase 7,869 16.2800 GBP
Purchase 13,353 16.3000 GBP
Purchase 7,259 16.3100 GBP
Purchase 8,500 16.3200 GBP
Purchase 3,437 16.3300 GBP
Purchase 2,206 16.3400 GBP
Purchase 3,340 16.3500 GBP
Purchase 4,248 16.3600 GBP
Purchase 3,652 16.3700 GBP
Purchase 2,464 16.3800 GBP
Purchase 6,842 16.3900 GBP
Purchase 12,163 16.4000 GBP
Purchase 1,796 16.4100 GBP
Purchase 15,000 16.4200 GBP
Purchase 14,293 16.4300 GBP
Purchase 3,167 16.4400 GBP
Purchase 1,200 16.4900 GBP
Purchase 1,200 16.5000 GBP
Purchase 622 16.5400 GBP
Purchase 36 16.5500 GBP
Purchase 43,265 16.5593 GBP
Purchase 21,245 16.9800 GBP
TOTAL 177,157

Sale 1,500 16.3200 GBP
Sale 6,433 16.3708 GBP
Sale 8,637 16.3710 GBP
Sale 89,119 16.3710 GBP
Sale 900 16.4100 GBP
Sale 964 16.4700 GBP
Sale 2,077 16.4900 GBP
Sale 5,579 16.5000 GBP
Sale 2,801 16.5100 GBP
Sale 2,916 16.5200 GBP
Sale 1,191 16.5300 GBP
Sale 6,261 16.5400 GBP
Sale 3,779 16.5500 GBP
Sale 3,302 16.5600 GBP
Sale 359 16.5700 GBP
Sale 1,307 16.5900 GBP
Sale 5,794 16.6000 GBP
Sale 1,806 16.6100 GBP
Sale 4,385 16.6200 GBP
Sale 622 16.6300 GBP
Sale 948 16.6500 GBP
Sale 1,680 16.6600 GBP
Sale 2,500 16.7600 GBP
Sale 2,245 16.9800 GBP
Sale 558 16.5406 GBP
TOTAL 176,663
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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 WarrantLong 50 0.5100 EUR
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Jun 2009 Call WarrantShort 250 0.4000 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 27 August 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
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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