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               06 March 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      47,223,151      4.73%     1,211,633      0.12%
securities
(2) Derivatives    2,421,881      0.24%       204,323      0.02%
(other than
options)
(3) Options and      146,650      0.01%       100,810      0.01%
agreements to
purchase/sell
Total             49,791,682      4.99%     1,516,766      0.15%


(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      606                   58.3060
Purchase      2,066                 58.6488
Purchase      452                   58.3588
Purchase      34                    58.2200
Purchase      474                   58.1017
Purchase      199                   58.3588
Purchase      3,322                 58.0700
Purchase      1,801                 58.3588
Purchase      70                    58.1900
Purchase      473                   58.3588
Purchase      16                    58.4300
Purchase      116                   58.3588
Purchase      147                   Transfer
Purchase      66,542                58.4633
Purchase      9,696                 58.4234
Purchase      254                   58.3971
Purchase      80                    58.3688
Purchase      9,343                 58.5715
Purchase      70                    58.1900
Purchase      214                   58.3588
Purchase      224                   58.3800
Purchase      9,087                 58.0700
Purchase      205                   58.3588
Purchase      52                    58.7100
Purchase      4,287                 58.0787
Purchase      25,202                58.2979
Purchase      728                   58.3588
Purchase      88                    58.2314
Purchase      255                   Transfer
Purchase      117                   58.3588
Purchase      195                   58.3588
Purchase      9,280                 58.0878
Sale          300                   58.5400
Sale          233                   58.0956
Sale          68                    58.2220
Sale          9                     58.1620
Sale          26                    58.2200
Sale          1,635                 Transfer
Sale          58                    58.3012
Sale          60                    58.5700
Sale          150                   58.2736
Sale          14                    58.7132
Sale          100                   58.3940
Sale          76                    58.5424
Sale          120                   58.2100
Sale          107                   58.1000
Sale          296                   58.2000
Sale          100                   58.2600
Sale          67                    58.7000
Sale          200                   58.1800
Sale          45                    58.7511
Sale          35                    58.2600
Sale          7                     58.3700
Sale          26                    58.7300
Sale          30                    58.7024
Sale          243                   58.2448
Sale          60                    58.2332
Sale          26                    58.1748
Sale          100                   58.2300
Sale          11                    58.1800
Sale          22                    58.5116
Sale          26                    58.7736
Sale          100                   58.3000
Sale          2,396                 58.3166
Sale          66                    58.2948
Sale          15                    58.8100
Sale          50                    58.2000
Sale          10                    58.6615
Sale          22                    58.5424
Sale          40                    58.2924
Sale          276                   Transfer
Sale          39                    58.6724
Sale          80                    58.2300
Sale          13                    58.4232
Sale          785                   58.3866
Sale          11                    58.3216
Sale          56                    58.1300
Sale          11                    58.7700
Sale          27                    58.2600
Sale          32                    58.5412
Sale          28                    58.5720
Sale          75                    58.3512
Sale          10,900                58.1315
Sale          28                    58.1400
Sale          60                    58.2900
Sale          21                    56.7740
Sale          87                    58.1820
Sale          37                    58.1900
Sale          58                    58.3724
Sale          5                     58.1500
Sale          50                    58.7624
Sale          376                   58.0700
Sale          20                    58.8500
Sale          518                   58.0700
Sale          100                   58.7032
Sale          35                    58.7000
Sale          32                    58.5224
Sale          53                    58.6421
Sale          41                    58.6640
Sale          17                    58.1500
Sale          120                   58.1100
Sale          49                    58.2700
Sale          88                    58.3600
Sale          14                    58.4700
Sale          33                    58.2900
Sale          100                   58.1900
Sale          11                    58.7624
Sale          8                     58.1900
Sale          14,390                58.4238
Sale          500                   58.1929
Sale          16                    58.7336
Sale          150                   57.9800
Sale          147                   Transfer
Sale          120                   58.2900
Sale          10                    58.8500
Sale          18                    58.7600
Sale          125                   58.2356
Sale          15                    8.5400

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         4287          58.0787
CFD            Short         9280          58.0877
CFD            Short         474           58.1016
CFD            Short         80            58.3687
CFD            Short         9696          58.4234
CFD            Short         66542         58.4632
CFD            Short         9343          58.5715
CFD            Short         2066          58.6487
CFD            Long          243           58.2447
CFD            Long          52            58.3845
CFD            Long          785           58.3865
CFD            Long          14390         58.4237

(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


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.

None


Is a Supplemental Form 8 attached? (Note 9)                 YES


Date of disclosure                         07 March 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   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   150                    4,000.0000       EURO           20/03/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   -10                    5,200.0000       EURO           19/12/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   100,000                56.0000          AMER           18/12/2009
Option            Purchased   45,000                 54.0000          AMER           20/03/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   250                    3,800.0000       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