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               23 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      14,903,278      3.26%       129,977      0.03%
securities
(2) Derivatives        9,107      0.00%        17,961      0.00%
(other than
options)
(3) Options and            0      0.00%             0      0.00%
agreements to
purchase/sell
Total             14,912,385      3.26%       147,938      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      10,155               146.8684 AUD
Purchase      3,551                149.5350 AUD
Purchase      157                  150.7150 AUD
Purchase      205                  150.0300 AUD
Purchase      909                  151.0100 AUD
Purchase      5,677                151.0100 AUD
Purchase      218                  151.0100 AUD
Purchase      36,237               151.0100 AUD
Purchase      526                  150.7519 AUD
Purchase      3,551                149.5350 AUD
Purchase      3,551                147.8048 AUD
Purchase      3,551                147.8048 AUD
Purchase      50                   147.0744 AUD
Purchase      306                  146.8200 AUD
Purchase      7,205                147.7091 AUD
Purchase      23                   147.3214 AUD
Purchase      352                  146.8200 AUD
Purchase      25                   147.3216 AUD
Purchase      13                   147.3216 AUD
Purchase      161                  146.8200 AUD
Purchase      9,932                151.0100 AUD
Sale          134                  146.8200 AUD
Sale          7,319                150.4404 AUD
Sale          4,013                150.0481 AUD
Sale          122                  146.8200 AUD
Sale          542                  152.2967 AUD
Sale          3,551                149.5350 AUD
Sale          1,602                149.5200 AUD
Sale          91                   151.2937 AUD
Sale          208                  149.5200 AUD
Sale          7,205                147.7091 AUD
Sale          461                  146.8200 AUD
Sale          3,551                147.8048 AUD
Sale          102                  146.8200 AUD
Sale          10,155               146.8684 AUD
Sale          70                   147.0006 AUD
Sale          1,492                150.7110 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          70            147.0005
CFD            Long          4013          150.048
CFD            Long          7319          150.4404
CFD            Long          542           152.2966
CFD            Short         50            147.0744
CFD            Short         205           150.03
CFD            Short         157           150.715

(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                         27 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