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               29 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      46,658,980      4.68%     1,209,141      0.12%
securities
(2) Derivatives    2,418,046      0.24%        92,818      0.01%
(other than
options)
(3) Options and      146,650      0.01%       100,810      0.01%
agreements to
purchase/sell
Total             49,223,676      4.93%     1,402,769      0.14%


(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      103                      Transfer
Purchase      2,604                    57.2000
Purchase      439                      57.9740
Purchase      5,074                    58.0689
Purchase      2,745                    57.2000
Purchase      22,734                   57.6497
Purchase      30                       Transfer
Purchase      529                      57.2000
Purchase      1,105                    57.6325
Purchase      11,084                   57.2000
Purchase      1,737                    57.2000
Purchase      10,825                   57.2000
Purchase      32,009                   57.2000
Purchase      3,370                    57.2000
Purchase      339                      57.9740
Purchase      258                      57.7200
Purchase      50                       57.2000
Purchase      746                      57.6698
Purchase      1,355                    57.6515
Purchase      36                       Transfer
Purchase      8,056                    57.2000
Purchase      147                      57.2000
Purchase      49                       57.8086
Purchase      928                      57.2000
Purchase      480                      57.9740
Purchase      9,356                    57.6700
Purchase      1,400                    57.9752
Purchase      5,890                    57.2000
Purchase      324                      57.9740
Purchase      5,634                    57.2000
Purchase      173                      57.2000
Purchase      1,140                    57.2000
Purchase      1,583                    57.2000
Purchase      880                      57.2000
Sale          17,349                   57.2000
Sale          50                       57.5800
Sale          124                      57.8700
Sale          741                      57.2000
Sale          195                      57.3800
Sale          2,712                    57.2000
Sale          21,704                   57.1874
Sale          565                      58.4400
Sale          92                       57.7700
Sale          2,289                    58.1544
Sale          150                      58.3700
Sale          30                       57.9548
Sale          1,759                    57.2000
Sale          4,498                    57.2000
Sale          9,090                    57.2000
Sale          6,614                    57.4222
Sale          100                      57.7100
Sale          135                      57.1600
Sale          100                      57.7900
Sale          103                      Transfer
Sale          129                      58.5700
Sale          40                       57.6875
Sale          395                      Transfer
Sale          104                      57.7332
Sale          149                      58.3242
Sale          18                       58.3200
Sale          158                      57.2000
Sale          9                        58.0323
Sale          36                       Transfer
Sale          800                      57.0914
Sale          220                      57.8240
Sale          261                      57.2000
Sale          3,096                    57.2000
Sale          258                      57.7200
Sale          273                      57.2000
Sale          325                      57.8300
Sale          8,325                    57.1900
Sale          30                       Transfer
Sale          7,315                    57.2000
Sale          104                      58.0850
Sale          2,175                    57.2000
Sale          1,915                    57.2000
Sale          1,233                    57.2000
Sale          160                      58.3032
Sale          18                       58.6050
Sale          38,308                   57.3946
Sale          34                       57.9675
Sale          3,500                    57.2000
Sale          5,193                    57.2000
Sale          1,081                    57.2000
Sale          35                       58.4500
Sale          2,136                    57.4983
Sale          18                       58.3625


NB: The below transactions which were previously disclosed have been cancelled
Deal Date  Purchase/Sale Number of Securities Price per unit (GBP)
26/02/2008 Purchase      64,000               57.4619

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         359           57.2
CFD            Short         22734         57.6496
CFD            Short         1355          57.6514
CFD            Short         746           57.6697
CFD            Short         9356          57.6699
CFD            Short         49            57.8085
CFD            Short         1400          57.9752
CFD            Long          800           57.0914
CFD            Long          21704         57.1873
CFD            Long          10545         57.2229
CFD            Long          38308         57.3945
CFD            Long          6614          57.4221
CFD            Long          2136          57.4982
CFD            Long          149           58.3241


(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                         03 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   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                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,800.0000       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



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