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               19 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      14,589,004      3.19%    1,580,040       0.35%
securities
(2) Derivatives          373      0.00%        1,249       0.00%
(other than
options)
(3) Options and            0      0.00%            0       0.00%
agreements to
purchase/sell
Total             14,589,377      3.19%    1,581,289       0.35%


(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      23,117               129.4100 AUD
Purchase      396                  130.3400 AUD
Purchase      398                  131.4031 AUD
Purchase      404                  131.4031 AUD
Purchase      497                  131.4031 AUD
Purchase      20                   130.3400 AUD
Purchase      102                  131.5921 AUD
Purchase      390                  131.4032 AUD
Purchase      46,269               129.4100 AUD
Purchase      290                  130.3400 AUD
Purchase      22,625               130.4727 AUD
Purchase      72                   130.3400 AUD
Purchase      110                  131.4031 AUD
Purchase      733                  130.3400 AUD
Purchase      7,845                130.2718 AUD
Purchase      40                   130.3400 AUD
Purchase      235                  131.5921 AUD
Purchase      231,275              129.4100 AUD
Purchase      1,572                130.3400 AUD
Purchase      1,594                131.4031 AUD
Purchase      118                  131.5921 AUD
Purchase      57,810               129.4100 AUD
Purchase      90                   130.3400 AUD
Purchase      7,685                130.5619 AUD
Purchase      73                   130.3400 AUD
Purchase      91                   130.3400 AUD
Purchase      70                   130.3400 AUD
Purchase      2,147                131.4032 AUD
Purchase      9,468                130.3400 AUD
Purchase      503                  131.4032 AUD
Purchase      7,845                130.2718 AUD
Purchase      23,117               129.4100 AUD
Purchase      226                  131.4031 AUD
Purchase      22,625               130.4727 AUD
Sale          7,685                130.5619 AUD
Sale          1,142                130.3400 AUD
Sale          7,685                130.5619 AUD
Sale          7,845                130.2718 AUD
Sale          22,625               130.4727 AUD
Sale          7,845                130.2718 AUD
Sale          7,845                130.2718 AUD
Sale          6,336                130.3995 AUD
Sale          19,942               130.3996 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          7845          130.2717

(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                         20 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