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               22 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      14,857,541      3.25%       128,110      0.03%
securities
(2) Derivatives        7,240      0.00%        27,626      0.01%
(other than
options)
(3) Options and            0      0.00%             0      0.00%
agreements to
purchase/sell
Total             14,864,781      3.25%       155,736      0.03%


(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      17,926               151.1171 AUD
Purchase      1,624                150.9941 AUD
Purchase      6,390                152.9878 AUD
Purchase      4,204                150.3104 AUD
Purchase      3,808                151.0402 AUD
Purchase      700                  155.0000 AUD
Purchase      779                  151.0100 AUD
Purchase      20,457               146.5170 AUD
Purchase      6,215                150.9949 AUD
Purchase      6,390                152.9878 AUD
Purchase      4,670                151.0100 AUD
Purchase      108                  151.0100 AUD
Purchase      1,100                155.0000 AUD
Sale          6,215                150.9949 AUD
Sale          1,129                151.2910 AUD
Sale          6,390                152.9878 AUD
Sale          20,457               146.5170 AUD
Sale          17,926               151.1171 AUD
Sale          1,007                150.1100 AUD
Sale          1,007                150.1100 AUD
Sale          4,204                150.3104 AUD
Sale          6,066                151.0100 AUD
Sale          4,670                151.0100 AUD
Sale          779                  151.0100 AUD
Sale          863                  151.0100 AUD
Sale          20,457               146.5170 AUD
Sale          32                   149.5488 AUD
Sale          396                  149.5489 AUD
Sale          741                  150.3600 AUD
Sale          918                  149.5489 AUD
Sale          6,215                150.9949 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          1129          151.2909
CFD            Short         1624          150.9941
CFD            Short         3808          151.0402

(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                         23 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