Rule 8.3 - RIO TINTO Limited

FORM 8.3

    DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE
              (Rule 8.3 of the City Code on Takeovers and Mergers)


1.   KEY INFORMATION

Name of person dealing        BARCLAYS PLC
(Note 1)
Company dealt in              RIO TINTO LIMITED
Class of relevant security    NPV
to which the dealings being
disclosed relate (Note 2)
Date of dealing               15 May 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 3)

                            Long                     Short

                      Number       (%)         Number       (%)

(1) Relevant      13,976,773      3.06%       218,565      0.05%
securities
(2) Derivatives        7,695      0.00%         1,724      0.00%
(other than
options)
(3) Options and            0      0.00%             0      0.00%
agreements to
purchase/sell
Total             13,984,468      3.06%       220,289      0.05%


(b)  Interests and short positions in relevant securities of the company, other
     than the class dealt in (Note 3)

Class of                    Long                     Short
relevant
security:

                  Number              (%)   Number              (%)

(1) Relevant
securities

(2) Derivatives
(other than
options)

(3) Options and
agreements to
purchase/sell

Total


  (c)  Rights to subscribe (Note 3)

Class of relevant security:   Details



3.   DEALINGS (Note 4)

  (a)  Purchases and sales

Purchase/sale Number of Securities Price per unit
                                   (GBP)
Purchase      2,856                151.2176 AUD
Purchase      3,172                152.4800 AUD
Purchase      806                  152.4800 AUD
Purchase      1,695                152.4800 AUD
Purchase      65,630               151.5291 AUD
Purchase      1,838                152.4800 AUD
Purchase      1,577                152.4349 AUD
Purchase      500                  152.1664 AUD
Purchase      2,808                152.4648 AUD
Purchase      32,856               152.1937 AUD
Purchase      140                  147.0100 AUD
Purchase      394                  147.0100 AUD
Purchase      30,000               152.2866 AUD
Purchase      1,099                152.4800 AUD
Sale          766                  151.7628 AUD
Sale          1,727                152.4800 AUD
Sale          702                  152.4800 AUD
Sale          806                  152.4800 AUD
Sale          2,251                152.4800 AUD
Sale          2,808                152.4648 AUD
Sale          65,630               151.5291 AUD
Sale          744                  151.7628 AUD
Sale          10,701               151.0628 AUD
Sale          109                  151.7627 AUD
Sale          2,742                150.9236 AUD
Sale          30,000               152.2866 AUD
Sale          2,856                151.2176 AUD
Sale          550                  151.7628 AUD
Sale          141                  152.4800 AUD
Sale          106                  152.2169 AUD
Sale          471                  152.4800 AUD
Sale          87                   151.7627 AUD
Sale          1,315                151.7627 AUD
Sale          868                  151.7627 AUD
Sale          1,753                151.4904 AUD
Sale          427                  151.7627 AUD
Sale          2,997                151.7627 AUD
Sale          4,759                151.7627 AUD
Sale          321                  151.7628 AUD
Sale          2,808                152.4648 AUD
Sale          4,923                151.7627 AUD
Sale          386                  151.7627 AUD
Sale          64                   151.7627 AUD
Sale          272                  151.7627 AUD
Sale          129                  151.7628 AUD
Sale          829                  151.7628 AUD
Sale          830                  151.7627 AUD
Sale          984                  151.7628 AUD
Sale          3,267                151.7627 AUD
Sale          693                  151.7627 AUD
Sale          792                  151.7628 AUD


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          2742          150.9235
CFD            Long          10701         151.0627
CFD            Short         500           152.1663
CFD            Short         1577          152.4349

(c)  Options transactions in respect of existing securities

(i)  Writing, selling, purchasing or varying

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


(ii) Exercising

Product name, e.g.  Number of           Exercise price per
call option         securities          unit (Note 5)




(d)  Other dealings (including new securities) (Note 4)


Nature of transaction Details           Price per unit
(Note 8)                                (if applicable)
                                        (Note 5)




4.   OTHER INFORMATION
None

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 8 attached? (Note 9)                 NO


Date of disclosure                         16 May 2008
Contact name                               Geoff Smith
Telephone number                           020 7116 2913
If a connected EFM, name of
offeree/offeror with which connected
If a connected EFM, state nature of
connection (Note 10)


Notes

The Notes on Form 8.3 can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk