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               07 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      46,541,201      4.66%     1,106,965      0.11%
securities
(2) Derivatives      842,620      0.08%     1,560,611      0.16%
(other than
options)
(3) Options and      101,200      0.01%         1,030      0.00%
agreements to
purchase/sell
Total             47,485,021      4.76%     2,668,606      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         7,890                 55.8000
Purchase         1,362                 54.4736
Purchase         84,225                54.8300
Purchase         84,225                54.8300
Purchase         18,470                55.6572
Purchase         52                    Transfer
Purchase         4,140                 54.2159
Purchase         3,405                 55.4576
Purchase         584                   54.4670
Purchase         210,562               54.3400
Purchase         2,339                 55.1976
Purchase         1,362                 54.4736
Purchase         6,752                 55.0692
Purchase         11,882                54.4462
Purchase         1,100                 55.7856
Purchase         1,534                 55.8000
Purchase         255                   55.8000
Purchase         342                   55.0000
Purchase         10,157                55.8000
Purchase         379,011               54.5578
Purchase         3,900                 55.4073
Purchase         609                   55.8000
Purchase         684                   55.1780
Purchase         10,206                55.3894
Purchase         20,527                55.3412
Purchase         290                   54.9453
Sale             19,452                55.7589
Sale             52                    Transfer
Sale             198                   55.2100
Sale             1,362                 54.4750
Sale             34,782                55.5896
Sale             10,003                54.6439
Sale             8,000                 55.8000
Sale             80                    55.4600
Sale             85,315                54.8236
Sale             379,011               54.5578
Sale             8,400                 54.2947
Sale             180                   54.3609
Sale             45                    55.3504
Sale             400                   55.2900
Sale             33,220                55.8000
Sale             5,016                 55.8000
Sale             3,600                 54.1000
Sale             350                   54.5000
Sale             174                   54.3220
Sale             45,496                54.2900

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          45496         54.29
CFD            Long          8400          54.2947
CFD            Long          10003         54.6438
CFD            Long          85315         54.8235
CFD            Long          393           54.8788
CFD            Long          34782         55.5896
CFD            Long          19452         55.7588
CFD            Short         4140          54.2159
CFD            Short         1563          54.437
CFD            Short         11882         54.4461
CFD            Short         1362          54.4735
CFD            Short         2958          54.8416
CFD            Short         6752          55.0691
CFD            Short         2339          55.1976
CFD            Short         20527         55.3412
CFD            Short         10206         55.3894
CFD            Short         3900          55.4073
CFD            Short         3405          55.4575
CFD            Short         18470         55.6572
CFD            Short         1100          55.7856
CFD            Short         2673          55.7889


(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                         08 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