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               20 August 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      13,678,686      2.99%       285,019      0.06%
securities
(2) Derivatives       8,488       0.00%         1,762      0.00%
(other than
options)
(3) Options and            0      0.00%             0      0.00%
agreements to
purchase/sell
Total             13,687,174      3.00%       286,781      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      19                   116.2500 AUD
Purchase      1,860                115.5204 AUD
Purchase      556                  115.5204 AUD
Purchase      54                   115.5204 AUD
Purchase      1                    116.2500 AUD
Purchase      4                    116.2500 AUD
Purchase      173                  115.5205 AUD
Purchase      58                   115.5204 AUD
Purchase      1                    116.2500 AUD
Purchase      6                    116.2500 AUD
Purchase      15                   116.2500 AUD
Purchase      14                   116.2500 AUD
Purchase      751                  115.5204 AUD
Purchase      18                   116.2500 AUD
Purchase      710                  115.5204 AUD
Purchase      19                   116.2500 AUD
Purchase      741                  115.5205 AUD
Purchase      117                  116.4954 AUD
Purchase      117                  116.5304 AUD
Purchase      827                  115.2030 AUD
Purchase      589                  115.5205 AUD
Purchase      14                   116.2500 AUD
Purchase      48                   116.2500 AUD
Purchase      403                  115.5204 AUD
Purchase      10                   116.2500 AUD
Purchase      4                    116.2500 AUD
Purchase      191                  115.5205 AUD
Purchase      20                   116.2500 AUD
Purchase      567                  115.5205 AUD
Purchase      260                  115.5204 AUD
Purchase      3,842                115.5205 AUD
Purchase      180                  115.5204 AUD
Purchase      2,147                115.5205 AUD
Purchase      55                   116.2500 AUD
Purchase      370                  115.5205 AUD
Purchase      1,358                115.5204 AUD
Purchase      9                    116.2500 AUD
Purchase      4                    116.2500 AUD
Purchase      108                  116.2500 AUD
Purchase      772                  115.5205 AUD
Purchase      35                   116.2500 AUD
Sale          306                  114.1772 AUD
Sale          301                  116.7000 AUD
Sale          117                  116.5304 AUD
Sale          2,943                116.4845 AUD
Sale          117                  116.5304 AUD
Sale          404                  116.2500 AUD
Sale          1,819                116.7000 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          306           114.1771
CFD            Long          2943          116.4844
CFD            Short         827           115.203

(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                         21 August 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