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               13 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      47,400,475      4.75%    1,151,264       0.12%
securities
(2) Derivatives    2,406,005      0.24%       91,264       0.01%
(other than
options)
(3) Options and       47,800      0.00%      700,810       0.07%
agreements to
purchase/sell
Total             49,854,180      5.00%    1,943,338       0.19%


(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      4,908                    54.5596
Purchase      2,720                    54.9905
Purchase      4                        55.2300
Purchase      80                       55.4276
Purchase      37,000                   55.0000
Purchase      622                      54.5288
Purchase      57                       55.4275
Purchase      1,947                    54.5442
Purchase      9,435                    55.0000
Purchase      110                      54.2472
Purchase      158                      54.9000
Purchase      10,000                   55.2300
Purchase      828                      55.1136
Purchase      2,800                    54.4800
Purchase      94                       54.4600
Purchase      7,600                    54.8862
Purchase      110                      Transfer
Purchase      2,720                    54.8631
Purchase      23,235                   54.4578
Purchase      7,742                    55.0000
Purchase      115                      54.2900
Purchase      6,724                    55.2300
Sale          40                       Transfer
Sale          10                       54.3350
Sale          2,800                    54.4800
Sale          14,222                   54.6006
Sale          110                      54.7440
Sale          100                      55.8125
Sale          163                      54.4825
Sale          280                      54.4625
Sale          67                       55.2525
Sale          21,800                   54.2857
Sale          4,668                    55.0000
Sale          6,720                    55.0000
Sale          200                      54.9436
Sale          97                       54.6700
Sale          210                      54.4240
Sale          55                       54.7280
Sale          137                      55.4036
Sale          9,348                    55.0000
Sale          110                      Transfer
Sale          225                      54.2775
Sale          200                      54.7575
Sale          11                       54.7975
Sale          125                      54.3350
Sale          100                      55.1275
Sale          52                       55.5375
Sale          158                      54.9400
Sale          40                       Transfer
Sale          250                      55.1200
Sale          72,993                   54.6702
Sale          55                       55.1925
Sale          48                       54.6364
Sale          3,832                    54.7791
Sale          4                        55.2300
Sale          26,452                   55.1162
Sale          49                       54.2424
Sale          50                       55.4426
Sale          6,724                    55.2300
Sale          58                       54.5500


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         1865          52.6678
CFD            Short         622           54.5287
CFD            Short         4908          54.5595
CFD            Short         2720          54.863
CFD            Short         7600          54.8861
CFD            Short         2720          54.9905
CFD            Short         828           55.1135
CFD            Long          1530          54.4911
CFD            Long          14222         54.6005
CFD            Long          72993         54.6701
CFD            Long          2302          54.9704
CFD            Long          26452         55.1161


(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                         14 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