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               15 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      47,009,068       4.71%      892,493      0.09%
securities
(2) Derivatives      631,455       0.06%    1,537,925      0.15%
(other than
options)
(3) Options and      101,200       0.01%        1,030      0.00%
agreements to
purchase/sell
Total             47,741,723       4.78%    2,431,448      0.24%


(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         2,064                 53.3692
Purchase         625                   52.7406
Purchase         117                   52.6000
Purchase         14,810                53.0806
Purchase         2,500                 52.8697
Purchase         21                    Transfer
Purchase         1,307                 53.3692
Purchase         504                   52.2000
Purchase         100                   52.0895
Purchase         4,497                 53.3692
Purchase         116                   52.2000
Purchase         117                   52.6300
Purchase         7,867                 54.8996
Purchase         494                   52.9446
Purchase         100                   52.3264
Purchase         1,001                 52.2000
Purchase         56,705                52.2000
Purchase         120                   53.4400
Purchase         8,088                 52.4666
Purchase         6,696                 52.6854
Purchase         80,000                52.4429
Purchase         205                   52.9446
Purchase         409                   52.9446
Purchase         382                   52.9446
Purchase         242                   52.9446
Purchase         8,400                 53.4972
Purchase         835                   52.9446
Purchase         6,389                 53.1625
Purchase         100                   53.4400
Purchase         6,298                 52.9522
Purchase         222                   52.9446
Purchase         7,131                 52.6343
Purchase         1,002                 52.9446
Purchase         2,212                 52.7750
Purchase         15,679                52.2000
Purchase         4,698                 53.4200
Purchase         403                   52.9446
Sale             25                    53.3042
Sale             9,318                 52.8895
Sale             185                   52.6121
Sale             5,790                 52.8231
Sale             9,900                 54.7740
Sale             10                    53.1184
Sale             72,563                52.9521
Sale             40                    52.4348
Sale             25,711                52.9462
Sale             13,668                52.7847
Sale             42                    54.8805
Sale             2,658                 52.5508
Sale             21                    Transfer
Sale             4,952                 52.4702
Sale             1,250                 52.3300
Sale             2,630                 Transfer
Sale             110                   54.6363
Sale             291                   53.1500
Sale             6,699                 52.2000
Sale             56,705                52.2000
Sale             80                    53.3840
Sale             92                    53.1784
Sale             100                   53.1784
Sale             45,529                52.7249
Sale             10,278                53.3667
Sale             100                   52.7784
Sale             1,084                 53.1677
Sale             4,491                 52.7989
Sale             62                    53.6000
Sale             106                   53.6000
Sale             10,044                54.5700
Sale             4,698                 53.4200
Sale             335                   52.3500
Sale             100                   53.3836
Sale             2,620                 52.4023
Sale             117                   52.6300
Sale             8,481                 53.3582
Sale             2,042                 52.5652
Sale             150                   52.9100
Sale             120                   52.9100
Sale             150                   52.7784
Sale             90                    52.7500
Sale             100                   52.7584
Sale             50                    53.2900
Sale             6,329                 52.2000
Sale             222                   52.2000
Sale             22,145                52.2000
Sale             779                   52.2000
Sale             400                   52.9000
Sale             1,214                 53.4100


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          6341          52.2105
CFD            Long          1250          52.33
CFD            Long          2620          52.4022
CFD            Long          4952          52.4701
CFD            Long          2658          52.5508
CFD            Long          2042          52.5652
CFD            Long          185           52.6121
CFD            Long          45529         52.7249
CFD            Long          13668         52.7846
CFD            Long          5790          52.8231
CFD            Long          25711         52.9462
CFD            Long          72563         52.952
CFD            Long          2366          52.958
CFD            Long          8481          53.3582
CFD            Long          9900          54.774
CFD            Short         80000         52.4428
CFD            Short         808           52.4665
CFD            Short         7131          52.6342
CFD            Short         6696          52.6854
CFD            Short         625           52.7406
CFD            Short         2212          52.775
CFD            Short         2500          52.8697
CFD            Short         14810         53.0805
CFD            Short         6389          53.1624
CFD            Short         7867          54.8996


(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                         16 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.
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

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