UBS AG Switzerland - EPT Disclosure

RNS Number:2724M
UBS AG Switzerland
22 January 2008

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

Name of exempt principal trader UBS AG Switzerland

Company dealt in Rio Tinto Plc

Class of relevant security to which the Rio Tinto Plc - Ordinary shares
dealings being disclosed relate (Note 1)

Date of dealing 21st January 2008

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)

Long Short
Number Number
(%) (%)

(1) Relevant securities
Rio Tinto Plc - Ordinary share 0 0

(2) Derivatives (other than options)

(3) Options and agreements to purchase/sell

Total 0 0

(b) Interests and short positions in relevant securities of the company,
other than the class dealt in (Note 2)

Class of relevant security: Long Short
Number Number
(%) (%)

(1) Relevant securities
Rio Tinto Plc - ADR (1 = 4 shares)

(2) Derivatives (other than options)

(3) Options and agreements to purchase/sell

Total

(c) Rights to subscribe (Note 2)

Class of relevant security: Details

3. DEALINGS (Note 3)

(a) Purchases and sales

Purchase/sale Number of securities Price per unit (Note 4)

Rio Tinto Plc - Ordinary shares
BUY 400 43.62 GBP
BUY 50 44.59 GBP
BUY 50 92.8 CHF
BUY 175 93.25 CHF
BUY 202 93.75 CHF
BUY 100 95 CHF
SELL 427 43.89 GBP
SELL 300 44.33 GBP
SELL 200 95.6 CHF
SELL 50 96.8 CHF

Total Buy: 977
Total Sell: 977

(b) Derivatives transactions (other than options)

Product name, Long/short (Note 5) Number of securities (Note 6) Price per unit (Note 4)
e.g. CFD

(c) Options transactions in respect of existing securities

(i) Writing, selling, purchasing or varying

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

(ii) Exercising

Product name, e.g. call option Number of securities Exercise price per unit (Note 4)

(d) Other dealings (including new securities) (Note 3)

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

4. OTHER INFORMATION

Agreements, arrangements or understandings relating to options or derivatives

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.

Is a Supplemental Form 38.5(b) attached? (Note 8) NO

Date of disclosure 22nd January 2008

Contact name Sophie Goodrich

Telephone number +41 44 239 6161

Name of offeree/offeror with which connected BHP Billiton Ltd and
BHP Billiton Plc

Nature of connection (Note 9) Connected Advisor

Notes

The Notes on Form 38.5(b) can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk

This information is provided by RNS
The company news service from the London Stock Exchange
END

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