Rule 8.3 - RIO TINTO LTD

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               10 December 2007

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      14,145,888      3.10%    2,064,950       0.45%
securities
(2) Derivatives            0      0.00%       14,866       0.00%
(other than
options)
(3) Options and            0      0.00%            0       0.00%
agreements to
purchase/sell
Total             14,145,888      3.10%    2,079,816       0.46%


(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      6,626                146.7000 AUD
Purchase      108                  146.7000 AUD
Purchase      27,606               146.8422 AUD
Purchase      109                  143.4800 AUD
Purchase      34,492               146.5390 AUD
Purchase      13,521               145.4800 AUD
Purchase      10,000               147.0667 AUD
Purchase      2,104                146.7000 AUD
Purchase      34,796               146.5057 AUD
Purchase      2,233                145.2848 AUD
Purchase      121                  146.7000 AUD
Purchase      20,684               145.4800 AUD
Purchase      2,544                146.7000 AUD
Purchase      17,606               146.7147 AUD
Purchase      194                  145.4800 AUD
Purchase      36,886               145.4800 AUD
Purchase      733                  147.1000 AUD
Sale          364                  146.5582 AUD
Sale          50                   146.5582 AUD
Sale          60                   147.1000 AUD
Sale          10,000               147.0667 AUD
Sale          17,606               146.7147 AUD
Sale          1,949                146.7000 AUD
Sale          3,500                146.9891 AUD
Sale          36,886               145.4800 AUD
Sale          162                  146.5583 AUD
Sale          34,796               146.5057 AUD
Sale          932                  146.5582 AUD
Sale          192                  146.5582 AUD
Sale          62                   147.1000 AUD
Sale          297                  147.1000 AUD
Sale          94                   145.0200 AUD
Sale          33                   147.1000 AUD
Sale          20,684               145.4800 AUD
Sale          109                  146.5582 AUD
Sale          15                   147.1000 AUD
Sale          2,802                143.8346 AUD
Sale          13,521               145.4800 AUD
Sale          113                  147.1000 AUD
Sale          1,018                144.3639 AUD
Sale          103                  147.1000 AUD
Sale          201                  146.5583 AUD
Sale          50                   147.1000 AUD
Sale          332                  146.5582 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         34492         146.539
CFD            Long          3500          146.9891

(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                         11 December 2007
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