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               09 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      47,076,699      4.72%     1,001,468      0.10%
securities
(2) Derivatives      726,025      0.07%     1,660,627      0.17%
(other than
options)
(3) Options and      101,200      0.01%         1,030      0.00%
agreements to
purchase/sell
Total             47,903,924      4.80%     2,663,125      0.27%


(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         2,793                 53.7021
Purchase         561                   53.1300
Purchase         190                   54.0875
Purchase         380                   54.1600
Purchase         120,408               53.4898
Purchase         3,733                 53.7021
Purchase         5,090                 54.1273
Purchase         210,562               53.6700
Purchase         3,604                 54.0761
Purchase         80,000                54.3004
Purchase         3,817                 53.2068
Purchase         2,249                 53.1300
Purchase         847                   54.0298
Purchase         1,766                 54.0887
Purchase         16,244                53.1698
Purchase         1,000                 53.4700
Purchase         8,239                 54.1077
Purchase         400                   54.1381
Purchase         45,656                53.4779
Purchase         15,000                53.0628
Purchase         9,667                 53.7021
Purchase         17,267                53.5409
Purchase         24,041                54.2148
Purchase         1,100                 53.4700
Purchase         3,700                 53.2724
Purchase         527                   53.1300
Purchase         1,140                 53.1300
Purchase         292                   53.1300
Purchase         345                   53.1300
Purchase         1,226                 54.0875
Purchase         426                   53.1300
Purchase         292                   53.1300
Purchase         190                   53.1300
Purchase         433                   54.0875
Purchase         334                   54.0875
Purchase         185                   54.0875
Sale             130                   53.1800
Sale             1,300                 53.9881
Sale             232                   54.1042
Sale             200                   53.0700
Sale             102                   53.4084
Sale             7,059                 54.1600
Sale             8,816                 52.6400
Sale             2,797                 53.8587
Sale             490                   54.1690
Sale             30,218                54.0968
Sale             11                    53.4418
Sale             7,893                 54.0552
Sale             4,215                 54.1600
Sale             120                   53.9532
Sale             100                   53.4205
Sale             100                   53.1800
Sale             90                    53.3300
Sale             550                   52.8700
Sale             50                    53.2906
Sale             4,316                 53.6709
Sale             3,400                 54.0371
Sale             14,355                53.9731
Sale             47,727                53.9710
Sale             85                    54.0840
Sale             75                    53.4884
Sale             340                   53.5539
Sale             150                   53.1263
Sale             60                    53.1800
Sale             260                   53.5900
Sale             860                   53.5700
Sale             2,356                 54.0837

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          11            53.4418
CFD            Long          340           53.5539
CFD            Long          4316          53.6709
CFD            Long          47727         53.971
CFD            Long          14355         53.973
CFD            Long          1300          53.9881
CFD            Long          3400          54.037
CFD            Long          7893          54.0551
CFD            Long          2356          54.0837
CFD            Long          30218         54.0967
CFD            Long          490           54.1689
CFD            Short         15000         53.0628
CFD            Short         16244         53.1698
CFD            Short         3817          53.2068
CFD            Short         3700          53.2724
CFD            Short         484           53.3101
CFD            Short         45656         53.4779
CFD            Short         120408        53.4898
CFD            Short         17267         53.5408
CFD            Short         1172          53.5961
CFD            Short         847           54.0297
CFD            Short         3604          54.0761
CFD            Short         1766          54.0886
CFD            Short         8239          54.1076
CFD            Short         5090          54.1273
CFD            Short         400           54.1381
CFD            Short         7865          54.1492
CFD            Short         24041         54.2148
CFD            Short         80000         54.3003


(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                         10 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)


Notes

The Notes on Form 8.3 can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk

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   -500                   7,000.0000       EURO           19/12/2008

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