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               21 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      14,880,628      3.26%       130,067      0.03%
securities
(2) Derivatives        9,197      0.00%        25,280      0.01%
(other than
options)
(3) Options and            0      0.00%             0      0.00%
agreements to
purchase/sell
Total             14,889,825      3.26%       155,347      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      108                  150.0500 AUD
Purchase      7,067                149.4621 AUD
Purchase      3,551                150.0350 AUD
Purchase      24,657               149.5151 AUD
Purchase      542                  149.9608 AUD
Purchase      256                  148.3810 AUD
Purchase      700                  149.4744 AUD
Purchase      6,344                150.0500 AUD
Sale          3,551                150.0350 AUD
Sale          1,083                149.5972 AUD
Sale          7,067                149.4621 AUD
Sale          700                  149.4744 AUD
Sale          9,190                150.0500 AUD
Sale          3,551                150.0350 AUD
Sale          340                  149.6658 AUD
Sale          3,785                156.1000 AUD
Sale          1,146                149.6659 AUD
Sale          121                  149.6658 AUD
Sale          1,051                149.6659 AUD
Sale          678                  149.6658 AUD
Sale          207                  149.6658 AUD
Sale          96                   149.6659 AUD
Sale          72                   149.6659 AUD
Sale          269                  149.6658 AUD
Sale          1,401                149.6659 AUD
Sale          859                  149.6658 AUD
Sale          408                  149.6659 AUD
Sale          803                  150.0500 AUD
Sale          347                  149.6658 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          1083          149.5971
CFD            Short         256           148.381
CFD            Short         24657         149.515
CFD            Short         542           149.9607

(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                         22 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