Rule 8.3 - RIO TINTO PLC

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
Class of relevant security    ORD GBP0.10
to which the dealings being
disclosed relate (Note 2)
Date of dealing               25 July 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      46,598,637       4.67%      819,948      0.08%
securities
(2) Derivatives      639,629       0.06%    1,714,427      0.17%
(other than
options)
(3) Options and        1,200       0.00%        1,300      0.00%
agreements to
purchase/sell
Total             47,339,466       4.74%    2,635,675      0.26%


(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         11,800                48.5624
Purchase         70,797                49.5081
Purchase         50                    49.0950
Purchase         4,483                 49.5400
Purchase         3,945                 49.4619
Purchase         69,035                49.0500
Purchase         200                   49.7325
Purchase         50,125                49.2086
Purchase         4,325                 49.1723
Purchase         14,159                49.5295
Purchase         3,397                 49.6357
Purchase         7,323                 48.8099
Purchase         200                   50.2158
Purchase         62                    Transfer
Sale             32,013                49.2049
Sale             58                    49.1784
Sale             125                   Transfer
Sale             100                   48.8619
Sale             33                    50.5405
Sale             54                    48.4042
Sale             5,486                 48.5298
Sale             50,125                49.2086
Sale             135                   49.7647
Sale             904                   49.0900
Sale             736,965               Transfer
Sale             632                   49.5400
Sale             421                   49.5400
Sale             908                   49.5400
Sale             2,039                 49.5400
Sale             400                   49.7000
Sale             3,373                 49.5400
Sale             120                   49.5400
Sale             166                   49.5400
Sale             2,863                 49.5400
Sale             16,803                48.9481
Sale             37,292                49.5400
Sale             900                   49.3211
Sale             5,041                 49.5400
Sale             1,393                 49.1626
Sale             296                   49.5400
Sale             4,653                 49.5400
Sale             117                   50.0400
Sale             100                   49.2098
Sale             2,569                 49.5400
Sale             823                   49.5400
Sale             185                   49.2900
Sale             1,341                 49.5400

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          5486          48.5297
CFD            Long          100           48.8619
CFD            Long          16803         48.9481
CFD            Long          2429          49.1465
CFD            Long          32013         49.2049
CFD            Long          50125         49.2085
CFD            Long          900           49.3211
CFD            Short         11800         48.5624
CFD            Short         7323          48.8098
CFD            Short         50            49.095
CFD            Short         4325          49.1723
CFD            Short         50125         49.2085
CFD            Short         1789          49.2308
CFD            Short         3945          49.4619
CFD            Short         70797         49.5081
CFD            Short         14159         49.5294
CFD            Short         3048          49.5301
CFD            Short         3397          49.6356

(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)                 YES


Date of disclosure                         28 July 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)


SUPPLEMENTAL FORM 8

DETAILS OF OPEN POSITIONS
(This form should be attached to Form 8.1, Form 8.1(b)(ii) or Form 8.3, as appropriate)

OPEN POSITIONS (Note 1)
Product name,     Written or  Number of securities   Exercise price   Type, e.g.     Expiry date
e.g. call option  purchased   to which the option    (Note 2)         American,
                              or derivative relates                   European etc.
Option            Purchased   100,000                56.0000          AMER           18/12/2009
Option            Purchased   500                    5,000.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   -135                   5,200.0000       EURO           19/12/2008
Option            Purchased   -145                   5,200.0000       EURO           19/12/2008
Option            Purchased   -250                   5,200.0000       EURO           19/09/2008
Option            Purchased   -270                   6,400.0000       EURO           19/12/2008
Option            Purchased   -500                   7,000.0000       EURO           19/12/2008
Option            Purchased   -100,000               64.0000          AMER           21/11/2008

Notes

1. Where there are open option positions or open derivative positions (except for CFDs), full details should be given.
Full details of any  existing agreements to purchase or to sell  should also be given on this form.

2. For all prices and other monetary amounts, the currency must be stated.

For details of the Code's dealing disclosure requirements, see Rule 8 and its Notes which can be viewed on the Takeover
Panel's website at www.thetakeoverpanel.org.uk