Rule 8.3 - RIO TINTO PLC

On previous Rule 8.3 reports for this issuer, nominee interests have been included. We are now advised that such
interests should not be included and the figures shown below reflect the revised calculations.

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               07 December 2007

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      47,423,712      4.76%    2,760,790       0.28%
securities
(2) Derivatives    2,486,765      0.25%      162,988       0.02%
(other than
options)
(3) Options and      204,131      0.02%    1,303,231       0.13%
agreements to
purchase/sell
Total             50,114,608      5.03%    4,227,009       0.42%


(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      717                  57.4557
Purchase      37                   56.5225
Purchase      3,684                57.4600
Purchase      1,562                57.4600
Purchase      55,578               55.1500
Purchase      64,314               57.4600
Purchase      33,002               57.4600
Purchase      10,084               56.9368
Purchase      36,366               56.7936
Purchase      20                   Transfer
Purchase      591                  Transfer
Purchase      4,443                56.6160
Purchase      1,687                56.9935
Purchase      130,                 146 56.9339
Purchase      6,607                57.4600
Purchase      7,053                57.2093
Purchase      880                  57.4600
Purchase      7,400                56.3589
Purchase      4,443                56.6160
Purchase      17,520               57.4600
Purchase      1,169                56.9855
Sale          115                  56.4425
Sale          4,443                56.6160
Sale          20,000               54.5975
Sale          400                  56.9725
Sale          12,596               56.9495
Sale          3,244                56.5359
Sale          26,641               56.4500
Sale          18,020               57.0200
Sale          400                  56.6250
Sale          50                   56.4738
Sale          76,713               57.3608
Sale          9                    56.5100
Sale          41                   56.2800
Sale          134                  Transfer
Sale          10,084               56.9368
Sale          1,875                57.2196
Sale          10,084               56.9368
Sale          80,891               57.0683
Sale          200                  57.0512
Sale          130,146              56.9339
Sale          175                  56.6037
Sale          30                   56.9287
Sale          100                  57.0900
Sale          125                  56.3850
Sale          120                  56.7675
Sale          243                  56.4215
Sale          4,594                57.0350
Sale          125                  56.3625
Sale          26,890               57.1266
Sale          252                  56.9784
Sale          92                   56.5850
Sale          3,942                57.4600
Sale          57,763               57.0481
Sale          110                  56.9537
Sale          20                   Transfer


NB: The below transactions which were previously disclosed have been cancelled
Deal Date  Purchase/Sale Number of Securities Price per unit (GBP)
04/12/2007 Sale          10,000               54.5975

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         4443          56.616
CFD            Short         36366         56.7936
CFD            Short         1687          56.9934
CFD            Short         7053          57.2093
CFD            Short         717           57.4557
CFD            Long          243           56.4215
CFD            Long          3244          56.5359
CFD            Long          10084         56.9367
CFD            Long          12596         56.9495
CFD            Long          57763         57.048
CFD            Long          26890         57.1265
CFD            Long          1875          57.2195


(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 December 2007
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   -300,000               56.0000          AMER           15/02/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -1,000                 3,500.0000       EURO           21/12/2007
Option            Purchased   -500                   4,400.0000       EURO           21/12/2007
Option            Purchased   -350                   5,200.0000       EURO           21/12/2007
Option            Purchased   -306                   4,200.0000       EURO           21/12/2007
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -275                   4,800.0000       EURO           21/12/2007
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   -600,000               42.0000          AMER           21/12/2007
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   200,000                60.0000          AMER           18/01/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,300.0000       EURO           21/12/2007
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    4,500.0000       EURO           21/12/2007
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   250                    6,000.0000       EURO           15/02/2008
Option            Purchased   275                    5,000.0000       EURO           21/12/2007
Option            Purchased   306                    4,800.0000       EURO           21/12/2007
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   450                    3,500.0000       EURO           21/12/2007
Option            Purchased   500                    5,200.0000       EURO           21/12/2007
Option            Purchased   100                    5,600.0000       EURO           18/01/2008



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