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               15 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      46,831,325      4.69%    1,412,548       0.14%
securities
(2) Derivatives    2,452,112      0.25%       60,237       0.01%
(other than
options)
(3) Options and       46,800      0.00%      100,810       0.01%
agreements to
purchase/sell
Total             49,330,237      4.94%    1,573,595       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      4,436                    54.9300
Purchase      5,324                    54.9418
Purchase      6,426                    55.1326
Purchase      4,385                    54.9300
Purchase      4,229                    54.9300
Purchase      5,027                    54.9300
Purchase      2,225                    55.1062
Purchase      224                      55.9656
Purchase      2,054                    55.9870
Purchase      18                       55.9850
Purchase      9,500                    55.7973
Purchase      417                      55.9191
Purchase      182                      55.8820
Purchase      2,455                    55.9870
Purchase      831                      55.9122
Purchase      12,179                   55.3788
Purchase      2,827                    55.4316
Purchase      39,000                   54.9300
Purchase      1,157                    55.9122
Purchase      5,878                    54.9600
Purchase      6,349                    54.9300
Purchase      9                        54.9600
Purchase      315                      55.9870
Purchase      3,879                    55.0068
Purchase      22,469                   55.1262
Purchase      229                      55.9870
Purchase      200                      55.0091
Sale          110                      56.1424
Sale          3,138                    55.1552
Sale          75                       55.8600
Sale          772                      54.8000
Sale          3,873                    55.4755
Sale          7,609                    55.1552
Sale          36                       55.5625
Sale          1,179                    55.1552
Sale          62                       Transfer
Sale          2,276                    55.1552
Sale          85                       56.2525
Sale          115                      55.0775
Sale          65                       56.1000
Sale          72                       55.1275
Sale          250                      55.7600
Sale          3,952                    55.1552
Sale          5,887                    54.9300
Sale          5,387                    55.1552
Sale          71,044                   55.1552
Sale          250,000                  60.0000
Sale          28,451                   55.1552
Sale          1,712                    54.9624
Sale          4,385                    54.9300
Sale          9                        55.0225
Sale          332                      55.1641
Sale          4,890                    54.9300
Sale          710                      55.1000
Sale          85                       56.0200
Sale          79                       55.2725
Sale          150                      56.0236
Sale          44                       Transfer
Sale          200                      55.2180
Sale          22                       55.2300
Sale          10,086                   55.8246
Sale          155                      56.2840
Sale          55                       55.1220
Sale          13,863                   55.1552
Sale          2,952                    55.1552
Sale          5,027                    54.9300
Sale          22,483                   55.7237
Sale          280                      55.0075
Sale          1,182                    55.9926
Sale          2,747                    55.1552
Sale          5,878                    54.9600
Sale          29                       54.8350
Sale          442                      55.1552
Sale          106,248                  54.9300
Sale          3,37                     54.9300
Sale          723                      55.2203
Sale          6,349                    54.9300
Sale          50                       56.2140
Sale          51                       Transfer
Sale          155                      55.1450
Sale          984                      55.1552
Sale          874                      55.1552
Sale          100                      56.0200
Sale          7,569                    55.1552
Sale          37,754                   54.9300
Sale          9                        54.9600
Sale          6,168                    55.8529
Sale          50                       55.0326
Sale          300                      55.1000
Sale          200                      54.8701
Sale          55                       55.4525
Sale          325                      54.8450
Sale          61                       55.1575
Sale          49                       Transfer
Sale          31                       55.8400
Sale          100                      55.0600

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         5324          54.9418
CFD            Short         3879          55.0068
CFD            Short         200           55.0091
CFD            Short         2225          55.1061
CFD            Short         22469         55.1262
CFD            Short         6426          55.1326
CFD            Short         12179         55.3787
CFD            Short         224           55.9655
CFD            Long          200           54.8701
CFD            Long          1712          54.9624
CFD            Long          332           55.1641
CFD            Long          554           55.3335
CFD            Long          31920         55.3788
CFD            Long          22483         55.7237
CFD            Long          10086         55.8246
CFD            Long          6168          55.8529
CFD            Long          1182          55.9925

(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                         18 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                    3,000.0000       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   150                    4,400.0000       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