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               25 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      46,453,620      4.66%     1,411,679      0.14%
securities
(2) Derivatives    2,570,363      0.26%        72,503      0.01%
(other than
options)
(3) Options and       46,650      0.00%       100,810      0.01%
agreements to
purchase/sell
Total             49,070,633      4.92%      1,584,992     0.16%


(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      188                      57.8000
Purchase      196                      58.1300
Purchase      4,800                    57.0755
Purchase      8,911                    57.4986
Purchase      259                      57.0473
Purchase      5,000                    57.4096
Purchase      430                      57.6500
Purchase      1,078                    57.1605
Purchase      20                       76.3000 EUR
Purchase      28,840                   57.6276
Sale          90                       57.2824
Sale          200                      57.5150
Sale          90                       57.5526
Sale          50                       57.6176
Sale          70                       57.4526
Sale          140                      57.4400
Sale          75                       57.5551
Sale          140                      57.0100
Sale          203                      57.2414
Sale          1,760                    56.9163
Sale          100                      57.6950
Sale          1,622                    57.2753
Sale          247                      57.2414
Sale          135                      57.2800
Sale          228                      57.5350
Sale          42,288                   57.0100
Sale          1,957                    57.6000
Sale          50                       57.5500
Sale          207,509                  56.8500
Sale          208                      57.4600
Sale          23,841                   57.2051
Sale          1,560                    57.2414
Sale          100                      57.5500
Sale          100                      57.7475
Sale          180                      57.2414
Sale          271                      57.2414
Sale          551                      Transfer
Sale          125                      57.6225
Sale          612                      57.2414
Sale          217                      57.2414
Sale          75                       57.5675
Sale          35                       57.5526
Sale          100                      57.2625
Sale          39                       57.2325
Sale          30                       57.3727
Sale          209                      57.2414
Sale          100                      57.6925
Sale          3,919                    57.2414
Sale          94,820                   57.2000
Sale          200                      57.5500
Sale          9,428                    57.2438
Sale          24                       Transfer
Sale          50                       57.4125
Sale          4,338                    57.5726
Sale          431                      57.4095

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         259           57.0473
CFD            Short         4800          57.0755
CFD            Short         182           57.1243
CFD            Short         1078          57.1605
CFD            Short         640           57.264
CFD            Short         8911          57.4985
CFD            Short         28840         57.6275
CFD            Long          1760          56.9163
CFD            Long          23841         57.2051
CFD            Long          9428          57.2438
CFD            Long          1622          57.2753
CFD            Long          431           57.4094
CFD            Long          4338          57.5726
CFD            Long          160           57.8413

(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                         26 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   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
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


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