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               18 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      46,807,623      4.69%    1,444,828       0.14%
securities
(2) Derivatives    2,503,680      0.25%       34,137       0.00%
(other than
options)
(3) Options and       46,800      0.00%      100,810       0.01%
agreements to
purchase/sell
Total             49,358,103      4.95%    1,579,775       0.16%


(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                      56.1825
Purchase      42,288                   57.0000
Purchase      456                      57.2600
Purchase      1,075                    56.9964
Purchase      3,495                    56.7195
Purchase      1,065                    56.6941
Purchase      11,996                   55.7272
Purchase      118                      56.3051
Purchase      911                      57.2600
Purchase      20,666                   56.4443
Sale          153                      Transfer
Sale          60                       56.8775
Sale          120                      56.2775
Sale          175                      57.0075
Sale          300                      56.5125
Sale          17                       55.5500
Sale          80                       56.9425
Sale          100                      56.8625
Sale          1,405                    56.3300
Sale          23,000                   56.8981
Sale          91                       56.5366
Sale          268                      56.7600
Sale          100                      56.7925
Sale          50                       56.7926
Sale          50                       56.2750
Sale          70                       56.1700
Sale          150                      56.9600
Sale          125                      56.9925
Sale          893                      56.6554
Sale          150                      56.7825
Sale          50,163                   56.5426
Sale          5,000                    56.7100
Sale          75                       56.8951
Sale          7,500                    56.4851
Sale          14                       56.0200
Sale          99                       56.6853
Sale          70                       56.3426
Sale          1,900                    Transfer
Sale          1,476                    57.0818
Sale          70                       56.7250
Sale          90                       56.0476
Sale          300                      56.2075
Sale          9,273                    56.5783
Sale          300                      56.9925
Sale          130                      56.2400
Sale          62                       55.6275
Sale          160                      55.7100
Sale          60                       56.5623
Sale          220                      56.5125
Sale          300                      56.7825
Sale          225                      56.5125
Sale          70                       57.0631
Sale          250                      56.4000
Sale          100                      56.4125
Sale          65                       56.3525
Sale          336                      55.6800
Sale          100                      56.9925
Sale          21                       55.6000
Sale          106                      55.6800

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         11996         55.7272
CFD            Short         118           56.305
CFD            Short         20666         56.4442
CFD            Short         1065          56.6941
CFD            Short         3495          56.7194
CFD            Short         1075          56.9964
CFD            Long          7500          56.4851
CFD            Long          91            56.5365
CFD            Long          50163         56.5426
CFD            Long          9273          56.5783
CFD            Long          893           56.6554
CFD            Long          99            56.6852
CFD            Long          46588         56.7195
CFD            Long          1476          57.0818


(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                         19 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   -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