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               28 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      46,739,519      4.68%     1,213,713      0.12%
securities
(2) Derivatives    2,407,358      0.24%       126,387      0.01%
(other than
options)
(3) Options and       46,650      0.00%       100,810      0.01%
agreements to
purchase/sell
Total             49,293,527      4.94%     1,440,910      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      3,400                    57.7200
Purchase      873                      58.7637
Purchase      6,950                    57.8281
Purchase      640                      58.1613
Purchase      35,000                   57.7000
Purchase      69,689                   58.0758
Purchase      800                      57.6974
Purchase      7,500                    56.4245
Purchase      100                      57.7200
Purchase      174                      58.1613
Purchase      360                      Transfer
Purchase      75                       59.0000
Purchase      360                      Transfer
Purchase      305                      57.7958
Purchase      18,500                   58.1212
Purchase      384                      58.1613
Purchase      4,436                    57.7200
Purchase      28                       58.4796
Purchase      402                      58.1613
Sale          85                       58.4400
Sale          180                      58.6500
Sale          3,693                    57.7237
Sale          50                       57.7926
Sale          190                      58.6924
Sale          150                      57.7500
Sale          19                       57.6375
Sale          75                       59.0000
Sale          360                      Transfer
Sale          17                       58.4750
Sale          50                       57.5300
Sale          150                      57.8950
Sale          30                       58.4325
Sale          16                       57.6800
Sale          180                      58.5112
Sale          200                      57.1114
Sale          157                      57.9075
Sale          150                      58.8075
Sale          200                      58.4925
Sale          687                      58.8305
Sale          100                      58.3925
Sale          19,759                   57.6919
Sale          90                       57.7826
Sale          360                      Transfer
Sale          70                       57.5826
Sale          150                      58.4136
Sale          11,100                   57.7200
Sale          769                      57.9422
Sale          16,980                   57.7200
Sale          45                       58.7051
Sale          69                       57.9142
Sale          27                       57.6375
Sale          170                      58.4150
Sale          125                      58.5532
Sale          1,700                    58.6500
Sale          125                      58.4312
Sale          90                       57.7350
Sale          207                      57.5050
Sale          26                       57.7875
Sale          11,747                   57.9369
Sale          100                      57.8500
Sale          20                       57.9200
Sale          50                       75.9900 EUR
Sale          70                       57.4611
Sale          43                       58.7774
Sale          85                       57.8040
Sale          126                      Transfer
Sale          186                      58.3000
Sale          35                       58.9649

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         7500          56.4245
CFD            Short         800           57.6973
CFD            Short         305           57.7957
CFD            Short         69689         58.0758
CFD            Short         18500         58.1212
CFD            Short         28            58.4796
CFD            Short         873           58.7636
CFD            Long          200           57.1114
CFD            Long          19759         57.6918
CFD            Long          3693          57.7236
CFD            Long          69            57.9142
CFD            Long          11747         57.9369
CFD            Long          687           58.8304


(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)
PUT             Purchase          100000             56        AMER            18/12/2009            .90


(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                         29 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   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