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               12 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      47,454,029      4.76%    1,122,884       0.11%
securities
(2) Derivatives    2,348,501      0.24%      131,861       0.01%
(other than
options)
(3) Options and       47,800      0.00%      700,810       0.07%
agreements to
purchase/sell
Total             49,850,230      5.00%    1,955,555       0.20%


(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      311                      53.8967
Purchase      262                      53.8967
Purchase      3,968                    53.8967
Purchase      40                       Transfer
Purchase      894                      53.1085
Purchase      708                      51.1117
Purchase      408                      53.1085
Purchase      708                      53.5000
Purchase      8,193                    54.2488
Purchase      1,715                    53.5107
Purchase      211                      53.1085
Purchase      191                      53.8967
Purchase      309                      53.8967
Purchase      1,359                    54.1839
Purchase      26,129                   53.7065
Purchase      996                      53.6841
Purchase      4,436                    55.2300
Purchase      40                       Transfer
Purchase      207                      53.1085
Purchase      27,860                   54.7025
Purchase      205                      53.8967
Purchase      18,231                   55.2300
Purchase      290                      53.7425
Purchase      208                      53.8967
Purchase      37,000                   55.0000
Purchase      356                      53.1085
Purchase      491                      53.1085
Purchase      497                      53.1085
Purchase      1,231                    53.1085
Purchase      1,588                    53.8967
Purchase      333                      53.1085
Purchase      33,891                   53.4774
Purchase      996                      53.9411
Purchase      771                      53.5107
Purchase      310                      53.7425
Sale          4,204                    54.3430
Sale          78                       53.5250
Sale          650                      53.7275
Sale          708                      51.1117
Sale          320                      53.4025
Sale          19,000                   55.2300
Sale          135                      53.2075
Sale          212                      53.5275
Sale          252                      Transfer
Sale          70                       54.5500
Sale          100                      54.6816
Sale          152                      53.3640
Sale          52,872                   54.2294
Sale          43,600                   52.8993
Sale          10,188                   55.2300
Sale          39                       52.3675
Sale          65                       54.2725
Sale          150                      52.9775
Sale          35,143                   55.2300
Sale          77                       52.7500
Sale          1,357                    53.9911
Sale          40                       Transfer
Sale          35                       53.1450
Sale          163                      55.0525
Sale          59,349                   54.4775
Sale          1,290                    54.9236




(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         996           53.684
CFD            Short         26129         53.7064
CFD            Short         1359          54.1838
CFD            Short         8193          54.2488
CFD            Short         27860         54.7025
CFD            Long          188           53.5223
CFD            Long          42            53.9572
CFD            Long          1357          53.9911
CFD            Long          52872         54.2294
CFD            Long          4204          54.3429
CFD            Long          506           54.372
CFD            Long          59349         54.4774
CFD            Long          1290          54.9236


(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                         13 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                    4,400.0000       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                   2,500.0000       EURO           20/06/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   -10                    5,200.0000       EURO           19/12/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   -300,000               56.0000          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                    4,000.0000       EURO           20/03/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
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   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