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 22 October 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 (%)
------------------------------------ ----------------- ----------------- ----------------- -------------------
(1) Relevant securities 3,209,954 0.1454% 157,181 0.0071%
------------------------------------ ----------------- ----------------- ----------------- -------------------
(2) Derivatives (other than options) 4,900 0.0002% 92,108 0.0042%
------------------------------------ ----------------- ----------------- ----------------- -------------------
(3) Options and agreements to
purchase/sell 200,000 0.0091% 1,000 0.0000%
------------------------------------ ----------------- ----------------- ----------------- -------------------
Total 3,414,854 0.1557% 250,289 0.0113%
------------------------------------ ----------------- ----------------- ----------------- -------------------
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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 683 8.7400 GBP
Purchase 385 8.7550 GBP
Purchase 78,261 8.7974 GBP
Purchase 42,845 8.8300 GBP
Purchase 3,000 8.9600 GBP
Purchase 3,500 8.9700 GBP
Purchase 5,750 8.9900 GBP
Purchase 651 9.0400 GBP
TOTAL 135,075

Sale 5,000 8.7600 GBP
Sale 6,800 8.7750 GBP
Sale 8,700 8.7800 GBP
Sale 9,500 8.7850 GBP
Sale 121,106 8.8000 GBP
Sale 1,719 8.8596 GBP
Sale 700 8.9100 GBP
TOTAL 153,525
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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
---------------------- --------------------- -------------------------------- -----------------------------
Dec 2008 Call Warrant Short 60 0.0150 EUR
---------------------- --------------------- -------------------------------- -----------------------------
Dec 2008 Put Warrant Long 500 0.2100 EUR
---------------------- --------------------- -------------------------------- -----------------------------
Jun 2009 Call Warrant Long 500 0.1800 EUR
---------------------- --------------------- -------------------------------- -----------------------------
Dec 2009 Cal Warrant Short 11,860 0.2300 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 (Note
varying etc. relates (Note 6) etc. 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 23 October 2008
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Contact name Fraser Wyeth
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Telephone number +44 (0) 20 7678 0480
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Name of offeree/offeror with which connected Rio Tinto
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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 Purchased 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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Oct 2008 Call Option Purchased 75,000 16.0000 GBP American 17-Oct-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