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               03 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      44,924,995      4.50%       993,490      0.10%
securities
(2) Derivatives      735,098      0.07%       182,959      0.02%
(other than
options)
(3) Options and      101,200      0.01%         1,030      0.00%
agreements to
purchase/sell
Total             45,761,293      4.59%     1,177,479      0.12%


(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         15,184                54.6000
Purchase         192                   54.1050
Purchase         395                   54.6000
Purchase         341                   54.6000
Purchase         1,612                 54.6000
Purchase         5,854                 54.6000
Purchase         395                   Transfer
Purchase         435                   54.6000
Purchase         246                   54.1050
Purchase         289                   54.6000
Purchase         1,600                 54.5762
Purchase         527                   54.6000
Purchase         8,073                 54.6000
Purchase         2,119                 54.9900
Purchase         1,600                 54.5081
Purchase         210,560               59.0040
Purchase         38,608                54.5239
Purchase         2,300                 53.9333
Purchase         70,727                54.1457
Purchase         9,662                 54.0015
Purchase         9,516                 53.6707
Purchase         440                   54.6000
Purchase         195                   54.1050
Purchase         950                   54.6000
Purchase         425                   54.2988
Purchase         1,428                 54.4424
Purchase         4,408                 54.6000
Purchase         367                   54.1900
Purchase         1,572                 54.1050
Purchase         336                   54.0500
Purchase         611                   54.6000
Purchase         361                   54.1050
Purchase         194                   53.6800
Purchase         10,764                54.6000
Purchase         1,031                 54.6000
Purchase         1,084                 54.6000
Purchase         108,000               54.4691
Purchase         6,384                 54.7753
Purchase         10,700                54.6374
Purchase         17,579                54.0498
Purchase         1,218                 54.6000
Purchase         112                   54.6000
Purchase         460                   54.6000
Sale             7,800                 53.5915
Sale             120                   52.9921
Sale             11,820                53.6802
Sale             85                    54.3140
Sale             4,314                 54.1084
Sale             14,073                54.2253
Sale             154,131               54.2160
Sale             6,000                 54.1022
Sale             5,000                 53.4414
Sale             36,681                54.5561
Sale             125                   53.7932
Sale             2,439                 54.6425
Sale             2,887                 54.1576
Sale             6,914                 55.1100
Sale             80                    54.5175
Sale             80                    54.1124
Sale             75                    53.9760
Sale             175                   53.4400
Sale             7,609                 53.3836
Sale             141                   Transfer
Sale             235                   Transfer
Sale             1,100                 53.4203
Sale             4,106                 54.4229
Sale             159                   55.4900
Sale             4,663                 53.8259
Sale             80                    53.5500


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          120           52.992
CFD            Long          7609          53.3835
CFD            Long          1100          53.4203
CFD            Long          7800          53.5914
CFD            Long          11820         53.6802
CFD            Long          247           54.0162
CFD            Long          6000          54.1022
CFD            Long          4314          54.1083
CFD            Long          154131        54.2159
CFD            Long          14073         54.2253
CFD            Long          4106          54.4229
CFD            Long          1827          54.5329
CFD            Long          36681         54.556
CFD            Short         9516          53.6706
CFD            Short         2300          53.9333
CFD            Short         9662          54.0014
CFD            Short         184           54.0238
CFD            Short         17579         54.0498
CFD            Short         70727         54.1456
CFD            Short         912           54.182
CFD            Short         108000        54.4691
CFD            Short         1600          54.508
CFD            Short         38608         54.5238
CFD            Short         1600          54.5762
CFD            Short         4830          54.5891
CFD            Short         10764         54.6
CFD            Short         10700         54.6374
CFD            Short         6384          54.7753


(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                         04 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