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               24 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      47,267,169       4.74%      792,387      0.08%
securities
(2) Derivatives      612,068       0.06%    1,623,964      0.16%
(other than
options)
(3) Options and        1,200       0.00%        1,300      0.00%
agreements to
purchase/sell
Total             47,440,305       4.75%    2,533,922      0.25%


(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         500                   50.0375
Purchase         2,080                 49.9354
Purchase         5,200                 50.2821
Purchase         84,225                50.0500
Purchase         596                   52.1674
Purchase         431,651               49.3392
Purchase         4,105                 48.9910
Purchase         126,224               51.3500
Purchase         210,562               49.3201
Purchase         42,112                50.1400
Purchase         30,572                50.3965
Purchase         11                    50.1099
Purchase         49                    Transfer
Purchase         1,151                 49.4685
Purchase         84,225                50.1400
Purchase         80                    49.8358
Purchase         3,306                 49.0500
Purchase         106                   49.9750
Purchase         106                   49.9750
Purchase         640                   49.9000
Purchase         1,337                 49.0500
Purchase         10,528                50.1000
Purchase         2,100                 50.2915
Purchase         408                   50.5800
Purchase         4,414                 49.4806
Purchase         62,100                49.0700
Purchase         8,152                 49.9113
Purchase         633                   50.0600
Purchase         29,405                50.2627
Purchase         283                   50.5800
Sale             90                    50.4105
Sale             48,900                49.3057
Sale             21,787                49.7794
Sale             1,350                 49.9373
Sale             103                   50.6284
Sale             56                    50.2263
Sale             10,119                49.2101
Sale             100                   50.5101
Sale             80                    48.7773
Sale             50                    50.0406
Sale             69,035                49.0500
Sale             200                   50.4632
Sale             400                   49.6100
Sale             4                     50.6342
Sale             6,968                 50.0243
Sale             431,651               49.3392
Sale             48,538                49.5213
Sale             596                   52.1674
Sale             12,193                49.9093
Sale             21                    50.5563
Sale             1,589                 50.4332
Sale             47                    50.5010
Sale             250                   50.5501


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          1244          49.0599
CFD            Long          10119         49.2101
CFD            Long          48900         49.3056
CFD            Long          48538         49.5213
CFD            Long          21787         49.7794
CFD            Long          12193         49.9092
CFD            Long          1350          49.9372
CFD            Long          1589          50.4332
CFD            Short         4105          48.9909
CFD            Short         1151          49.4685
CFD            Short         4414          49.4806
CFD            Short         1022          49.9329
CFD            Short         2080          49.9354
CFD            Short         500           50.0375
CFD            Short         2268          50.1361
CFD            Short         29405         50.2626
CFD            Short         910           50.2652
CFD            Short         5200          50.2821
CFD            Short         30572         50.3964


(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)
Call            Selling           270                64        EURO            19/12/2008  16.1

(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                         25 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