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               05 February 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      47,237,392      4.74%    1,429,436       0.14%
securities
(2) Derivatives    2,534,528      0.25%       88,036       0.01%
(other than
options)
(3) Options and       47,800      0.00%      700,810       0.07%
agreements to
purchase/sell
Total             49,819,720      4.99%     2,218,282      0.22%


(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          321                       54.9230
Purchase          99                        54.8448
Purchase          1,551                     54.9748
Purchase          30,000                    54.3400
Purchase          1,378                     54.8811
Purchase          368                       54.9230
Purchase          344                       55.1030
Purchase          2,080                     54.9230
Purchase          7,072                     54.5399
Purchase          426                       54.3400
Purchase          796                       54.9230
Purchase          2,468                     Transfer
Purchase          91,847                    54.6618
Purchase          22,551                    54.5090
Purchase          2,575                     54.3400
Purchase          2,276                     54.9230
Purchase          803                       54.3400
Purchase          10,144                    53.9400
Purchase          69                        54.3400
Purchase          471                       54.4902
Purchase          15,166                    54.6147
Purchase          64                        53.9400
Purchase          91                        54.5000
Purchase          355                       54.9230
Purchase          23,834                    55.2700
Purchase          539                       54.9230
Purchase          500                       54.2381
Purchase          853                       54.9230
Purchase          12,719                    54.9230
Purchase          2,564                     54.9230
Sale              4,789                     54.8300
Sale              29                        55.6275
Sale              59                        55.3250
Sale              16                        55.3175
Sale              365                       54.9200
Sale              63                        55.1650
Sale              64                        54.7800
Sale              73                        55.3175
Sale              250                       53.9850
Sale              200                       54.2150
Sale              2,468                     Transfer
Sale              90                        54.4226
Sale              10,144                    53.9400
Sale              245                       54.0700
Sale              55                        54.1375
Sale              50                        55.2975
Sale              23                        55.3025
Sale              149                       54.4100
Sale              33                        55.3175
Sale              12,218                    55.0053
Sale              5,750                     54.4105
Sale              300                       54.0050
Sale              25                        54.7124
Sale              400                       54.2250
Sale              23,834                    55.2700
Sale              176                       54.4200
Sale              36                        55.3175
Sale              11,955                    54.3473
Sale              13                        55.7900
Sale              75                        55.1551
Sale              44                        55.1425
Sale              55                        54.6425
Sale              4,127                     54.2269
Sale              54                        55.3250
Sale              32                        55.2975
Sale              150                       54.5225
Sale              81                        55.2950
Sale              50                        54.2526
Sale              43                        55.2025
Sale              16                        55.3175
Sale              40                        73.0100 EUR
Sale              350                       54.5200
Sale              64                        53.9400
Sale              808                       54.3400
Sale              35                        55.1400
Sale              10,080                    54.3400

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         500           54.2381
CFD            Short         22551         54.509
CFD            Short         7072          54.5399
CFD            Short         15166         54.6146
CFD            Short         91847         54.6617
CFD            Short         99            54.8448
CFD            Long          4127          54.2268
CFD            Long          11955         54.3473
CFD            Long          5750          54.4104
CFD            Long          53            54.5066
CFD            Long          1405          54.5384
CFD            Long          334           54.546

(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                         06 February 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                    4,000.0000       EURO           20/03/2008
Option            Purchased   -300,000               56.0000          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   -10                    5,200.0000       EURO           19/12/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   -300,000               52.0000          AMER           15/02/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   45,000                 54.0000          AMER           20/03/2008
Option            Purchased   150                    4,400.0000       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                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,800.0000       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   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