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               21 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      46,869,966      4.70%     1,363,242      0.14%
securities
(2) Derivatives    2,560,036      0.26%        65,768      0.01%
(other than
options)
(3) Options and       46,650      0.00%       100,810      0.01%
agreements to
purchase/sell
Total             49,476,652      4.96%      1,529,820     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      191                      58.8704
Purchase      1,501                    58.8704
Purchase      9,355                    57.8000
Purchase      914                      58.8704
Purchase      2,779                    57.8000
Purchase      9,725                    58.2305
Purchase      228                      58.8704
Purchase      11,840                   58.3984
Purchase      4,083                    57.8000
Purchase      3,825                    58.8704
Purchase      2,840                    58.0512
Purchase      677                      58.8704
Purchase      229                      58.8704
Purchase      462                      57.9392
Purchase      610                      58.8704
Purchase      236                      58.8704
Purchase      239                      58.8704
Purchase      212                      58.8704
Purchase      858                      58.8704
Purchase      498                      58.8704
Purchase      20                       78.6000 EUR
Purchase      312                      58.8704
Purchase      261                      58.8704
Sale          75                       58.9251
Sale          75                       58.3000
Sale          100                      58.9100
Sale          80                       58.3100
Sale          61                       58.3000
Sale          130                      58.9100
Sale          285                      59.0292
Sale          100                      59.0740
Sale          12                       59.0875
Sale          80                       58.9100
Sale          120                      58.9775
Sale          60                       58.3000
Sale          50                       58.4300
Sale          150                      58.2575
Sale          36                       58.2300
Sale          75                       58.9251
Sale          11,700                   58.2935
Sale          10,188                   58.2200
Sale          125                      58.7732
Sale          70                       58.8020
Sale          80                       58.9100
Sale          150                      58.0475
Sale          50                       57.8208
Sale          165                      59.0832
Sale          16,281                   58.5630
Sale          3,103                    58.2098
Sale          254                      57.9848
Sale          100                      58.3000
Sale          767                      58.2200
Sale          50                       57.8176
Sale          105                      58.1412
Sale          50                       58.1626
Sale          1,802                    58.2200
Sale          70                       58.8731
Sale          60                       58.9100
Sale          90                       58.8050
Sale          1,744                    58.2200
Sale          38                       57.2325
Sale          171                      59.0224
Sale          64,320                   58.5744
Sale          243                      58.2200
Sale          75                       58.9100
Sale          31                       56.9175
Sale          250                      58.0100
Sale          50                       58.9100
Sale          50                       58.9100
Sale          395                      58.2200
Sale          97                       56.9975
Sale          47                       58.2825
Sale          313                      58.2200
Sale          65                       57.2040
Sale          90                       58.9100
Sale          14                       57.4250
Sale          60                       58.3000
Sale          201                      57.3950
Sale          80                       58.9550

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         462           57.9392
CFD            Short         2840          58.0511
CFD            Short         9725          58.2304
CFD            Short         11840         58.3984
CFD            Long          254           57.9847
CFD            Long          249           58.0135
CFD            Long          3103          58.2098
CFD            Long          11700         58.2935
CFD            Long          217           58.471
CFD            Long          16281         58.563
CFD            Long          64320         58.5743
CFD            Long          476           59.0119


(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                         22 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                   5,200.0000       EURO           20/03/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
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