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               18 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      50,310,477     5.04%       937,580       0.09%
securities
(2) Derivatives    2,393,115     0.24%       139,238       0.01%
(other than
options)
(3) Options and         2,500    0.00%       700,800       0.07%
agreements to
purchase/sell
Total              52,706,092    5.28%      1,777,618      0.18%

(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      100                  62.8500 EUR
Purchase      30                   46.2400
Purchase      407                  47.1032
Purchase      100                  62.9000 EUR
Purchase      47,340               47.0000
Purchase      500                  47.0878
Purchase      52,434               47.2601
Purchase      4,405                47.0000
Purchase      500                  47.0878
Purchase      121,584              46.3919
Purchase      300                  47.4000
Purchase      2,633                47.0000
Purchase      848                  47.0000
Purchase      6,100                46.0643
Purchase      4,807                47.5922
Purchase      2,233                46.7083
Purchase      142,019              47.2632
Purchase      121,584              46.3919
Purchase      21,249               46.8543
Purchase      448                  46.0937
Purchase      100                  63.3500 EUR
Purchase      80,355               46.1563
Purchase      2,800                47.1190
Purchase      37                   46.3000
Purchase      100                  62.8300 EUR
Purchase      23,897               47.0136
Purchase      6,100                46.0643
Purchase      104,805              48.0619
Purchase      54,111               47.3768
Purchase      7,024                46.9036
Purchase      2,866                46.0937
Purchase      105                  47.1200
Purchase      12,956               46.8267
Purchase      6,011                47.0000
Purchase      4,537                47.1836
Purchase      37,000               47.0000
Purchase      15,995               46.9400
Sale          121,584              46.3919
Sale          7,024                46.8989
Sale          500                  47.0878
Sale          1,500                47.5100
Sale          104,805              48.0619
Sale          27                   45.7225
Sale          21,249               46.8501
Sale          407                  47.1032
Sale          37,000               47.0000
Sale          2,800                47.1190
Sale          54,111               47.3768
Sale          142,019              47.2632
Sale          30                   46.2400
Sale          142,019              47.2632
Sale          4,537                47.1836
Sale          100                  46.0544
Sale          12,956               46.8267
Sale          80                   46.0336
Sale          120                  47.3132
Sale          84,370               46.9997
Sale          140                  47.2700
Sale          52,434               47.2515
Sale          6,100                46.0643
Sale          75                   46.1751
Sale          120                  46.2124
Sale          2,800                47.1190
Sale          4,807                47.5875
Sale          407                  47.1032
Sale          161                  47.3300
Sale          23,897               47.0093
Sale          80,355               46.1563
Sale          2,233                46.7013
Sale          1,842                47.0000
Sale          19,577               47.0000
Sale          100                  63.0000 EUR
Sale          46                   46.1800
Sale          47,340               47.0000
Sale          390                  47.3700
Sale          185                  46.3156

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         6100          46.0643
CFD            Short         80355         46.1562
CFD            Short         1515          46.5993
CFD            Short         12956         46.8266
CFD            Short         19734         46.8739
CFD            Short         7024          46.9036
CFD            Short         500           47.0878
CFD            Long          2233          46.7012
CFD            Long          19631         46.9384
CFD            Long          407           47.1031
CFD            Long          2800          47.119
CFD            Long          4537          47.1835
CFD            Long          52434         47.2515
CFD            Long          4266          47.3353
CFD            Long          54111         47.3767
CFD            Long          4807          47.5874

(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                         21 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   125                    4,400.0000       EURO           20/06/2008
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   -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   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/20081.

 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