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               01 February 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      47,581,973      4.77%    1,430,034       0.14%
securities
(2) Derivatives    2,575,043      0.26%       99,585       0.01%
(other than
options)
(3) Options and       47,800      0.00%      700,810       0.07%
agreements to
purchase/sell
Total             50,204,816      5.03%     2,230,429      0.22%


(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                109,601                   56
Purchase                15,832                    56.7215
Purchase                93                        54.89
Purchase                1,878                     56.3089
Purchase                11,350                    56
Purchase                2,559                     54.4969
Purchase                1,495                     55.6479
Purchase                2,245                     56
Purchase                23,834                    55.6048
Purchase                2,559                     54.4969
Purchase                2,025                     54.8247
Purchase                1,364                     54.8247
Purchase                255                       56.5346
Purchase                4,564                     54.8247
Purchase                27,038                    55.8224
Purchase                1,253                     56.6573
Purchase                1,253                     56
Purchase                1,018                     56
Purchase                23,834                    55.6048
Purchase                39,715                    56.5903
Purchase                18,870                    54.5447
Purchase                500                       53.6
Purchase                1,000                     57
Purchase                250                       56.5346
Purchase                9,800                     55.1032
Purchase                18,953                    57.1105
Sale                    650                       56.97
Sale                    90                        54.875
Sale                    50                        72.5
Sale                    50                        56.7
Sale                    190                       55.9225
Sale                    15,832                    56.7215
Sale                    500                       55
Sale                    2,559                     54.4969
Sale                    200                       55
Sale                    50                        56.7
Sale                    300                       57.005
Sale                    100                       56.5
Sale                    50                        56.7
Sale                    120                       55.485
Sale                    500                       57.145
Sale                    78                        55.53
Sale                    49,500                    55.4445
Sale                    100                       56.9825
Sale                    3,400                     55.8186
Sale                    88,592                    60
Sale                    50                        56.7
Sale                    50                        56.7
Sale                    900                       56.97
Sale                    150                       55
Sale                    192                       56.77
Sale                    55                        56.02
Sale                    500                       57.06
Sale                    580                       56.77
Sale                    125                       56.94
Sale                    500                       53.6
Sale                    50                        56.7
Sale                    80                        56.94
Sale                    50                        56.7
Sale                    50                        56.7
Sale                    50                        56.5
Sale                    250                       56.97
Sale                    1,000                     56.97
Sale                    44                        56.77
Sale                    30,847                    60
Sale                    20,776                    60
Sale                    150                       56.77
Sale                    50                        56.7
Sale                    15,800                    57.2427
Sale                    3,719                     57.0356
Sale                    50                        56.7
Sale                    100                       56.97
Sale                    69,535                    60
Sale                    100                       56.94
Sale                    210                       56.745
Sale                    150                       55
Sale                    100                       56.5
Sale                    150                       56.55
Sale                    20                        57.05
Sale                    450                       56.97
Sale                    50                        56.7
Sale                    1,253                     56
Sale                    115                       56.5
Sale                    150                       56.5
Sale                    50                        56.7
Sale                    50                        56.7
Sale                    1,000                     56.89
Sale                    150                       56.5
Sale                    210                       56.5
Sale                    3,200                     55.8186
Sale                    154,235                   56.8115
Sale                    25,200                    54.45
Sale                    53                        56.77
Sale                    50                        56.7
Sale                    59,000                    60
Sale                    1,495                     55.6804
Sale                    99                        56.77
Sale                    93                        57.6004
Sale                    75                        56.7
Sale                    250                       55
Sale                    50                        56.7
Sale                    400                       55
Sale                    50                        56.9036
Sale                    80                        56.5
Sale                    50                        56.7
Sale                    127                       56.77
Sale                    150                       55
Sale                    50                        56.7
Sale                    8,000                     56.4075
Sale                    60                        56.7
Sale                    160                       56.0425
Sale                    27                        54.3024
Sale                    89                        56.4731
Sale                    600                       55
Sale                    50                        56.7
Sale                    27                        56.01
Sale                    100                       74
Sale                    100                       56.7
Sale                    90                        56.77
Sale                    85                        56.97
Sale                    200                       57.2375
Sale                    50                        56.7
Sale                    130                       56.0825
Sale                    150                       55
Sale                    33,400                    57.2427
Sale                    50                        56.77
Sale                    57                        56.77
Sale                    200                       55
Sale                    6,709                     57.56
Sale                    50                        56.7
Sale                    39,600                    60
Sale                    60                        56.7
Sale                    477                       56.77
Sale                    100                       56.7
Sale                    187                       Transfer
Sale                    100                       75.5
Sale                    2,253                     56.8094
Sale                    3,500                     55.65
Sale                    250                       55
Sale                    100                       56.5
Sale                    49                        75.5
Sale                    50                        56.7
Sale                    250                       55
Sale                    1,615                     56.96
Sale                    250                       56.77
Sale                    50                        56.7
Sale                    90                        56.77
Sale                    62,023                    56.7288
Sale                    42                        56
Sale                    55                        56.77
Sale                    23                        56.475
Sale                    135                       56.77
Sale                    1,000                     56.3975
Sale                    161,026                   56.5991
Sale                    50                        56.7
Sale                    1,495                     55.6479
Sale                    30                        57.232
Sale                    15,832                    56.7215
Sale                    75                        56.97
Sale                    350                       55.87
Sale                    50                        56.7
Sale                    23,834                    55.6048
Sale                    50                        56.77
Sale                    60                        56.0425
Sale                    87,200                    55.6992
Sale                    65                        56.77
Sale                    170                       57.4316
Sale                    38                        56.8616
Sale                    70                        56.77
Sale                    50                        55.965
Sale                    400                       55
Sale                    51,200                    56.3436
Sale                    150                       56.77
Sale                    400                       55
Sale                    359                       55.64
Sale                    24,422                    55.8536
Sale                    24                        56.3925
Sale                    250                       55
Sale                    125                       56.5
Sale                    200                       55
Sale                    190                       56.5
Sale                    25                        76.37
Sale                    312                       56.77
Sale                    50                        56.7
Sale                    142                       56.7
Sale                    157                       56.77
Sale                    187                       56.77
Sale                    55                        57.23
Sale                    50                        56.7
Sale                    77                        56.77
Sale                    100                       56.44
Sale                    1,200                     55.9402
Sale                    3,600                     54.59
Sale                    2,000                     57.23
Sale                    500                       55.7475
Sale                    400                       55

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         2559          54.4969
CFD            Short         18870         54.5446
CFD            Short         9800          55.1031
CFD            Short         24796         55.7657
CFD            Short         1878          56.3089
CFD            Short         2242          56.4483
CFD            Short         39715         56.5903
CFD            Short         18953         57.1104
CFD            Long          24422         55.8535
CFD            Long          1200          55.9402
CFD            Long          8000          56.4075
CFD            Long          89            56.4731
CFD            Long          15832         56.7215
CFD            Long          62023         56.7287
CFD            Long          154235        56.8114
CFD            Long          3719          57.0355

(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            Purchase          45000              54        AMER            20/03/2008  .505

(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 February 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   150                    4,000.0000       EURO           20/03/2008
Option            Purchased   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   -10                    5,200.0000       EURO           19/12/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   -300,000               52.0000          AMER           15/02/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   45,000                 54.0000          AMER           20/03/2008
Option            Purchased   150                    4,400.0000       EURO           20/03/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   500                    5,600.0000       EURO           15/02/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
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