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               23 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      50,553,098      5.07%      838,643       0.08%
securities
(2) Derivatives    2,342,115      0.23%      267,576       0.03%
(other than
options)
(3) Options and        2,500      0.00%      700,800       0.07%
agreements to
purchase/sell
Total             52,898,013      5.30%     1,807,019      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      120,000                  41.2880
Purchase      30,727                   41.9621
Purchase      16,987                   41.6827
Purchase      53,511                   41.5900
Purchase      120,000                  41.2880
Purchase      378                      43.3400
Purchase      32,505                   41.5900
Purchase      121,322                  41.6430
Purchase      7,899                    41.5228
Purchase      830                      43.2815
Purchase      15,724                   41.8631
Purchase      100                      41.5900
Purchase      516                      43.2810
Purchase      463                      Transfer
Purchase      7,564                    42.9500
Purchase      302                      43.2815
Purchase      28,066                   41.6657
Purchase      604                      41.8502
Purchase      39,083                   41.5900
Purchase      483                      42.9500
Purchase      16,987                   41.6827
Purchase      50                       41.3700
Purchase      894                      42.6063
Purchase      39                       Transfer
Purchase      24,247                   43.3500
Purchase      1,513                    42.9866
Purchase      2,200                    42.8438
Purchase      2                        41.5900
Purchase      7                        41.5900
Purchase      24                       Transfer
Purchase      80                       41.8900
Purchase      119                      43.2815
Purchase      382                      42.6063
Purchase      35,834                   41.6086
Purchase      5,320                    41.5900
Sale          29,360                   41.9503
Sale          19,960                   41.7155
Sale          812                      41.6951
Sale          1,610                    41.5900
Sale          53                       43.3500
Sale          8,733                    43.2447
Sale          2,200                    42.8438
Sale          366                      41.9458
Sale          120,000                  41.2880
Sale          411                      41.5900
Sale          70                       42.3844
Sale          129                      43.3000
Sale          2                        41.5900
Sale          310                      41.6425
Sale          9,000                    41.6000
Sale          45                       42.1700
Sale          39                       Transfer
Sale          28,641                   43.2137
Sale          16,987                   41.6827
Sale          6,111                    42.9500
Sale          7,564                    42.9500
Sale          7,159                    41.5900
Sale          44,718                   41.5900
Sale          100                      41.5900
Sale          2,200                    42.8438
Sale          33,270                   41.5795
Sale          5,320                    41.5900
Sale          112,109                  41.4517
Sale          350                      41.1300
Sale          7                        41.5900
Sale          70                       42.3844
Sale          483                      42.9500
Sale          300                      42.1400
Sale          24,959                   41.5900


NB: The below transactions which were previously disclosed have been cancelled
Deal Date      Purchase/Sale    Number of Securities    Price per unit (GBP)
22/01/2008     Purchase         14,470                  41.1813
22/01/2008     Sale             10,851                  41.0215

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         120000        41.288
CFD            Short         7899          41.5228
CFD            Short         121322        41.643
CFD            Short         16987         41.6826
CFD            Short         15724         41.863
CFD            Short         22314         41.9448
CFD            Short         8413          42.0078
CFD            Long          112109        41.4517
CFD            Long          6190          41.8557
CFD            Long          366           41.9457
CFD            Long          23170         41.9755
CFD            Long          2200          42.8438
CFD            Long          2409          43.1871
CFD            Long          28641         43.2137
CFD            Long          1842          43.5206
CFD            Long          30141         43.8219

(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)
CALL            Purchase          150                44        EURO            20/03/2008  3.18
PUT             Purchase          150                40        EURO            20/03/2008  3.34

(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                         24 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                    4,400.0000       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                    4,000.0000       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