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               31 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      48,346,523      4.85%    1,078,384       0.11%
securities
(2) Derivatives    2,411,114      0.24%       86,363       0.01%
(other than
options)
(3) Options and        2,800      0.00%      700,810       0.07%
agreements to
purchase/sell
Total             50,760,437      5.09%     1,865,557      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      26,350                   49.5600
Purchase      36,850                   49.5600
Purchase      50                       48.9976
Purchase      3,587                    49.0488
Purchase      57                       49.5600
Purchase      1,000                    48.1241
Purchase      2,531                    49.5600
Purchase      2,196                    49.1658
Purchase      78                       49.5600
Purchase      886                      49.5600
Purchase      7,738                    48.9108
Purchase      47                       49.5600
Purchase      235                      49.5600
Purchase      39                       48.8100
Purchase      1,040                    49.5600
Purchase      49                       65.1200 EUR
Purchase      250                      Transfer
Purchase      3,400                    48.7167
Purchase      2,779                    48.6573
Purchase      36,978                   48.1900
Purchase      100                      65.8000 EUR
Purchase      7,738                    48.9108
Purchase      13,668                   49.5600
Purchase      3,690                    49.5600
Purchase      3,514                    49.0688
Purchase      101                      48.9000
Purchase      3,941                    49.5600
Purchase      7,838                    49.5600
Purchase      52,691                   48.7178
Purchase      7,915                    48.6409
Purchase      1,459                    49.5600
Purchase      100                      65.1200 EUR
Purchase      1,109                    49.5600
Purchase      5,109                    49.5600
Purchase      10,929                   49.5600
Purchase      1,017                    49.5600
Sale          14,834                   49.5600
Sale          700                      48.4798
Sale          800                      48.4798
Sale          579                      49.5600
Sale          16,585                   48.6143
Sale          59,863                   48.6351
Sale          42,268                   49.4400
Sale          78                       49.5600
Sale          13                       48.1550
Sale          36,850                   49.5600
Sale          2,779                    48.6573
Sale          7,838                    49.5600
Sale          919                      Transfer
Sale          2,769                    Transfer
Sale          7,738                    48.9108
Sale          35                       48.1500
Sale          3,762                    49.5600
Sale          6,810                    49.5600
Sale          1,347                    49.5600
Sale          70                       48.7500
Sale          78                       48.8376
Sale          26,350                   49.5600
Sale          20,000                   49.5600
Sale          100                      48.0032
Sale          677                      48.7057
Sale          50                       48.5400
Sale          2,779                    48.6573
Sale          2,253                    49.5600
Sale          9,250                    48.6046
Sale          15,291                   48.6691
Sale          18,242                   48.5275

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         1000          48.1241
CFD            Short         786           48.4861
CFD            Short         7129          48.6579
CFD            Short         3400          48.7167
CFD            Short         52691         48.7178
CFD            Short         7738          48.9107
CFD            Short         3514          49.0688
CFD            Long          8435          48.5079
CFD            Long          18242         48.5274
CFD            Long          9250          48.6045
CFD            Long          59863         48.6351
CFD            Long          2779          48.6573
CFD            Long          15291         48.669
CFD            Long          46            48.6766
CFD            Long          1043          48.6974
CFD            Long          8150          48.7243
CFD            Long          811           48.7467

(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                         01 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   150                    4,400.0000       EURO           20/03/2008
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                   2,500.0000       EURO           20/06/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   -10                    5,200.0000       EURO           19/12/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   500                    5,600.0000       EURO           15/02/2008
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   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   125                    4,400.0000       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