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               09 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      50,241,954     5.04%       953,720       0.10%
securities
(2) Derivatives    2,366,679     0.24%       137,744       0.01%
(other than
options)
(3) Options and      202,500     0.02%        01,200       0.07%
agreements to
purchase/sell
Total              52,811,133    5.30%      1,792,664      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      3,684                50.0100
Purchase      105                  51.0981
Purchase      225                  50.0706
Purchase      994                  51.1960
Purchase      16,267               51.2821
Purchase      1,558                51.0981
Purchase      243                  51.0981
Purchase      1,072                50.3500
Purchase      16,980               51.3400
Purchase      287                  51.3400
Purchase      7,764                50.3772
Purchase      1,549                51.3400
Purchase      503                  51.7367
Purchase      50                   50.1776
Purchase      713                  50.2575
Purchase      488                  50.7800
Purchase      1,842                50.3200
Purchase      197                  50.7262
Purchase      17,864               51.3400
Purchase      4,429                50.3200
Purchase      139                  50.4600
Purchase      331                  50.7262
Purchase      4,647                51.3400
Purchase      149                  51.8822
Purchase      614                  49.8340
Purchase      4,435                51.3400
Purchase      4,429                51.3400
Purchase      4,722                50.7252
Purchase      1,698                50.7262
Purchase      486                  51.7000
Purchase      12,426               50.4375
Purchase      191                  49.9700
Purchase      25,294               50.6251
Purchase      5,269                51.3400
Purchase      4,539                51.3400
Purchase      1,053                50.6700
Purchase      20,334               51.6562
Purchase      51,266               50.6240
Purchase      10,215               50.5803
Purchase      1,743                50.3200
Purchase      27,493               50.7079
Purchase      4,647                50.3200
Purchase      9,756                51.2194
Purchase      11,502               50.8154
Purchase      197                  50.7262
Purchase      51,266               50.6240
Purchase      670                  50.0100
Purchase      39                   51.0500
Purchase      151                  50.5300
Purchase      26,058               50.6057
Purchase      576                  51.5200
Purchase      10,740               51.7367
Purchase      15,490               51.3400
Sale          21,888               51.3400
Sale          4,722                50.7202
Sale          35                   Transfer
Sale          50                   50.6400
Sale          150                  50.2550
Sale          50                   50.6400
Sale          18,803               52.1500
Sale          139                  50.4550
Sale          2,338                50.7800
Sale          25,294               50.6251
Sale          225                  50.0631
Sale          7,764                50.3697
Sale          1,053                50.6700
Sale          1,072                50.3500
Sale          713                  50.2484
Sale          12,426               50.4330
Sale          51,266               50.6240
Sale          191                  49.9700
Sale          100                  50.6012
Sale          226                  50.8800
Sale          10,215               50.5758
Sale          488                  50.7800
Sale          18,803               52.1500
Sale          210                  50.5675
Sale          11,502               50.8154
Sale          26,058               50.6057
Sale          60                   50.1040
Sale          614                  49.8340
Sale          82                   Transfer
Sale          149                  51.8822
Sale          151                  50.5300
Sale          27,493               50.7079
Sale          26,058               50.6057
Sale          2,139                50.3200
Sale          100                  50.3900

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         1072          50.35
CFD            Short         7764          50.3772
CFD            Short         4492          50.4833
CFD            Short         5723          50.6564
CFD            Short         27493         50.7079
CFD            Short         4722          50.7252
CFD            Long          225           50.063
CFD            Long          713           50.2484
CFD            Long          7700          50.2649
CFD            Long          139           50.4549
CFD            Long          1053          50.67
CFD            Long          4726          50.7066
CFD            Long          11502         50.8154
CFD            Long          62            51.2154

(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                         10 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   -300,000               56.0000          AMER           15/02/2008
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
Option            Purchased   200,000                60.0000          AMER           18/01/2008
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   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   500                    5,600.0000       EURO           15/02/2008
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