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               08 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      14,110,556      3.09%       248,110      0.05%
securities
(2) Derivatives        7,240      0.00%        30,244      0.01%
(other than
options)
(3) Options and            0      0.00%             0      0.00%
agreements to
purchase/sell
Total             14,117,796      3.09%        278,354     0.06%


(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      359                  142.5666 AUD
Purchase      106                  145.4000 AUD
Purchase      5,673                145.4000 AUD
Purchase      6,344                145.4000 AUD
Purchase      1,458                145.4000 AUD
Purchase      7,254                145.1303 AUD
Purchase      7,142                145.3855 AUD
Purchase      29,013               144.3379 AUD
Purchase      7,254                145.1303 AUD
Purchase      6,894                144.4797 AUD
Purchase      125                  142.7700 AUD
Purchase      8,244                145.2470 AUD
Purchase      4,161                145.4000 AUD
Sale          919                  144.1441 AUD
Sale          501                  144.1440 AUD
Sale          914                  144.1441 AUD
Sale          265                  144.1440 AUD
Sale          7,254                145.1303 AUD
Sale          6,894                144.4797 AUD
Sale          8,244                145.2470 AUD
Sale          7,142                145.3855 AUD
Sale          243                  144.1440 AUD
Sale          7,142                145.3855 AUD
Sale          76                   145.4000 AUD
Sale          721                  144.1440 AUD
Sale          410                  145.4000 AUD
Sale          72                   142.7700 AUD
Sale          256                  142.7700 AUD
Sale          187                  144.1441 AUD
Sale          289                  144.1441 AUD
Sale          529                  144.1441 AUD
Sale          752                  144.6154 AUD
Sale          748                  144.1440 AUD
Sale          561                  144.1440 AUD
Sale          560                  144.1440 AUD
Sale          182                  144.1441 AUD
Sale          47                   144.1441 AUD
Sale          5,575                144.6153 AUD
Sale          815                  144.1440 AUD
Sale          256                  144.1440 AUD
Sale          123                  144.1440 AUD
Sale          241                  144.1440 AUD
Sale          155                  144.1440 AUD
Sale          217                  144.1441 AUD
Sale          987                  144.1441 AUD
Sale          3,585                144.1440 AUD
Sale          405                  144.1440 AUD

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         359           142.5665
CFD            Short         29013         144.3378

(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                         09 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