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               16 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      50,284,618     5.04%       891,540       0.09%
securities
(2) Derivatives    2,357,293     0.24%       115,099       0.01%
(other than
options)
(3) Options and      202,500     0.02%       701,200       0.07%
agreements to
purchase/sell
Total              52,844,411    5.30%     1,707,839       0.17%

(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      45                   47.8580
Purchase      500                  48.3775
Purchase      713                  46.6500
Purchase      2,089                47.7163
Purchase      500                  46.9900
Purchase      91,000               47.8680
Purchase      1,036                48.0941
Purchase      218                  46.6500
Purchase      222                  48.2372
Purchase      175                  48.1350
Purchase      204                  48.0941
Purchase      12,411               48.2744
Purchase      3,341                47.0503
Purchase      34,650               47.9681
Purchase      2,753                48.0941
Purchase      8,818                48.0941
Purchase      400                  47.6500
Purchase      450                  48.1575
Purchase      1,066                48.1258
Purchase      4,705                49.6154
Purchase      472                  48.0941
Purchase      32,981               48.3027
Purchase      207                  48.0941
Purchase      300                  48.2372
Purchase      92,526               47.8746
Purchase      2,116                46.6620
Purchase      4,653                46.6500
Purchase      431                  48.0941
Purchase      1,347                47.8610
Purchase      7,344                47.9266
Purchase      27,292               46.8733
Purchase      588                  Transfer
Purchase      419                  48.1559
Purchase      8,991                48.2842
Purchase      210                  48.0941
Purchase      150                  48.0750
Purchase      1,500                50.2400
Purchase      8,740                48.2332
Purchase      12,579               46.7898
Purchase      500                  48.3060
Purchase      4,987                48.5825
Purchase      1,439                48.6132
Purchase      7,595                48.0291
Purchase      1,107                48.3069
Purchase      60,972               48.4791
Purchase      532                  48.2372
Purchase      438                  47.7163
Purchase      6,155                47.5627
Purchase      500                  48.3060
Purchase      1,686                47.7163
Purchase      1,969                48.0863
Purchase      1,637                47.1726
Purchase      41,008               46.6500
Purchase      42                   Transfer
Purchase      88                   48.0900
Purchase      32,981               48.3027
Purchase      26,600               48.7040
Purchase      408                  Transfer
Purchase      1,969                48.0863
Purchase      1,603                46.6584
Purchase      527                  46.6500
Purchase      516                  48.0941
Purchase      509                  48.0941
Sale          42                   Transfer
Sale          3,341                47.0503
Sale          27,292               46.8733
Sale          851                  48.0600
Sale          88                   48.0900
Sale          12,411               48.2701
Sale          12,579               46.7898
Sale          8,991                48.2842
Sale          1,347                47.8562
Sale          91,000               47.8680
Sale          397                  49.5800
Sale          155                  48.2700
Sale          3,565                46.6500
Sale          2,903                47.6872
Sale          1,439                48.6132
Sale          50                   48.0576
Sale          8,740                48.2289
Sale          1,969                48.0863
Sale          125                  48.0850
Sale          100                  48.2200
Sale          195                  63.9900 EUR
Sale          2,116                46.6536
Sale          60,972               48.4791
Sale          1,637                47.1679
Sale          12,579               46.7898
Sale          4,705                49.6079
Sale          34,650               47.9681
Sale          1,066                48.1258
Sale          1,107                48.3069
Sale          419                  48.1559
Sale          1,603                46.6500
Sale          190                  64.8000 EUR
Sale          134                  49.0000
Sale          3,150                46.6500
Sale          3,341                47.0503
Sale          7,344                47.9266
Sale          7,595                48.0291
Sale          29,885               47.0053
Sale          6,155                47.5627
Sale          34,650               47.9681
Sale          500                  48.3060
Sale          4,987                48.5752
Sale          32,981               48.3027

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         1603          46.6583
CFD            Short         1347          47.8609
CFD            Short         72            48.0243
CFD            Short         7595          48.029
CFD            Short         1969          48.0862
CFD            Short         8668          48.2349
CFD            Short         8991          48.2842
CFD            Short         500           48.306
CFD            Short         4705          49.6153
CFD            Long          2116          46.6536
CFD            Long          12579         46.7897
CFD            Long          3341          47.0502
CFD            Long          1637          47.1678
CFD            Long          6155          47.5626
CFD            Long          7344          47.9265
CFD            Long          2795          47.9745
CFD            Long          9616          48.3559
CFD            Long          4987          48.5752

(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                         17 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   -400                   5,600.0000       EURO          18/01/2008
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   -300,000               56.0000          AMER          15/02/2008
Option            Purchased   125                    4,400.0000       EURO          20/06/2008
Option            Purchased   200,000                60.0000          AMER          18/01/2008
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   500                    5,600.0000       EURO          15/02/2008
Option            Purchased   50                     5,400.0000       EURO          20/03/2008

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