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               30 January 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      48,411,049      4.85%    1,065,691       0.11%
securities
(2) Derivatives    2,416,521      0.24%      139,422       0.01%
(other than
options)
(3) Options and        2,800      0.00%      700,800       0.07%
agreements to
purchase/sell
Total             50,830,370      5.10%     1,905,923      0.19%


(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      15,531                   47.8592
Purchase      487                      48.1133
Purchase      100                      63.9700 EUR
Purchase      2,577                    47.7680
Purchase      214                      48.0003
Purchase      248                      48.0003
Purchase      2,577                    47.7680
Purchase      41                       47.6676
Purchase      254                      47.9547
Purchase      7,230                    48.1882
Purchase      2,040                    47.8000
Purchase      1,700                    Transfer
Purchase      215                      48.0003
Purchase      8,365                    47.8933
Purchase      26                       48.0100
Purchase      2,026                    48.0003
Purchase      4,226                    48.1900
Purchase      5,000                    46.2251
Purchase      252                      48.0003
Purchase      2,760                    48.0466
Purchase      7,340                    47.8000
Purchase      214                      48.0003
Purchase      2,219                    48.1900
Purchase      34,227                   47.8061
Purchase      1,107                    46.2500
Purchase      16,833                   47.8000
Purchase      624                      46.2500
Purchase      2,656                    48.0003
Purchase      1,269                    47.9900
Purchase      218                      48.0003
Purchase      4,998                    47.8000
Sale          13,668                   48.1519
Sale          14,800                   47.8222
Sale          90                       47.8050
Sale          7,045                    47.9901
Sale          27                       46.5300
Sale          59,647                   48.0886
Sale          547                      48.1900
Sale          2,577                    47.7680
Sale          52                       48.0200
Sale          131                      47.7624
Sale          153                      48.0160
Sale          65                       48.0325
Sale          42                       47.5820
Sale          3,466                    48.1525
Sale          211,340                  48.0200
Sale          571                      47.8640
Sale          808                      48.0972
Sale          6,947                    47.8882
Sale          46                       47.6000
Sale          5,000                    46.2251
Sale          1,269                    47.8967
Sale          137,833                  47.9965
Sale          240                      47.5200
Sale          159                      47.6516
Sale          22,200                   47.5067
Sale          16,708                   48.1018

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         8947          47.6995
CFD            Short         2577          47.768
CFD            Short         34227         47.8061
CFD            Short         8365          47.8932
CFD            Short         6584          48.0761
CFD            Short         7230          48.1882
CFD            Long          571           47.864
CFD            Long          6947          47.8882
CFD            Long          4793          47.9766
CFD            Long          2252          48.0186
CFD            Long          59647         48.0885
CFD            Long          13668         48.1518
CFD            Long          3466          48.1524

(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)

CALL               Sale           10                  52       EURO             19/12/2008     6.7

(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                         31 January 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   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   150                    4,400.0000       EURO           20/03/2008
Option            Purchased   150                    4,000.0000       EURO           20/03/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   -10                    5,200.0000       EURO           19/12/2008
Option            Purchased   500                    5,600.0000       EURO           15/02/2008
Option            Purchased   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   -300,000               52.0000          AMER           15/02/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       EURO           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