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               29 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      48,792,353      4.89%    1,075,886       0.11%
securities
(2) Derivatives    2,443,424      0.24%      193,132       0.02%
(other than
options)
(3) Options and        2,800      0.00%      700,800       0.07%
agreements to
purchase/sell
Total             51,238,577      5.14%     1,969,818      0.20%


(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      819                      46.7900
Purchase      48,986                   46.5883
Purchase      230                      46.6500
Purchase      200                      46.5225
Purchase      6,336                    46.5604
Purchase      109                      Transfer
Purchase      623                      46.2500
Purchase      21,970                   46.3596
Purchase      30                       Transfer
Purchase      230                      46.7500
Purchase      3,770                    46.9349
Purchase      6,828                    46.5569
Purchase      2,981                    46.5940
Purchase      2,219                    46.7000
Purchase      11,600                   46.7000
Purchase      2,021                    46.7000
Purchase      4,800                    46.4003
Purchase      190                      46.7925
Purchase      58                       46.7850
Purchase      2,981                    46.5940
Purchase      1,000                    46.7678
Purchase      573                      46.7454
Purchase      15,043                   46.6057
Purchase      1,852                    46.3043
Purchase      11,903                   46.5138
Purchase      36                       Transfer
Purchase      295                      46.2500
Purchase      50                       Transfer
Purchase      1,042                    46.7000
Sale          5,124                    46.5500
Sale          90                       46.5820
Sale          80                       46.6775
Sale          12,204                   46.8040
Sale          160                      46.5800
Sale          11,903                   46.5138
Sale          2,400                    46.5173
Sale          20,000                   46.7000
Sale          150                      46.5736
Sale          235                      46.5771
Sale          160                      46.5800
Sale          109                      46.3675
Sale          62                       46.1300
Sale          49                       46.6725
Sale          23                       Transfer
Sale          4,390                    46.4068
Sale          200                      46.5800
Sale          11,903                   46.5138
Sale          30                       Transfer
Sale          109                      Transfer
Sale          27                       46.3724
Sale          100                      62.2300 EUR
Sale          36                       Transfer
Sale          430                      46.5225
Sale          151                      46.7000
Sale          68,372                   46.5464
Sale          600                      46.5800
Sale          230                      46.6500
Sale          2,981                    46.5940
Sale          84,536                   46.5700
Sale          2,102                    46.5500
Sale          30                       61.4700 EUR
Sale          6,677                    46.5477
Sale          150                      46.4775
Sale          59                       47.4022
Sale          230                      46.7850
Sale          1,042                    46.7000

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         1852          46.3043
CFD            Short         4800          46.4002
CFD            Short         200           46.5225
CFD            Short         6828          46.5569
CFD            Short         6336          46.5604
CFD            Short         48986         46.5883
CFD            Short         2981          46.5939
CFD            Short         8682          46.5952
CFD            Short         6361          46.6199
CFD            Short         1000          46.7678
CFD            Long          4390          46.4067
CFD            Long          11903         46.5137
CFD            Long          2400          46.5173
CFD            Long          68372         46.5464
CFD            Long          6677          46.5477
CFD            Long          235           46.577
CFD            Long          370           46.6047
CFD            Long          12204         46.804
CFD            Long          59            47.4022

(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                         30 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   150                    4,000.0000       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                   5,200.0000       EURO           20/03/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
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                    4,400.0000       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