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               22 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      46,798,915      4.69%     1,373,991      0.14%
securities
(2) Derivatives    2,570,785      0.26%        69,635      0.01%
(other than
options)
(3) Options and       46,650      0.00%       100,810      0.01%
agreements to
purchase/sell
Total             49,416,350      4.95%     1,544,436      0.15%


(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      2,154                    57.4756
Purchase      3,500                    56.8500
Purchase      2,192                    57.5698
Purchase      5,567                    57.6172
Purchase      8,336                    57.2314
Purchase      1,134                    57.8000
Purchase      7,715                    56.8500
Purchase      36                       Transfer
Purchase      4,000                    56.7872
Purchase      275                      57.8213
Purchase      3,103                    57.2462
Purchase      1,200                    57.1737
Purchase      30                       Transfer
Sale          79                       Transfer
Sale          150                      57.5350
Sale          280                      57.9575
Sale          50                       57.1850
Sale          126                      Transfer
Sale          4,929                    56.8500
Sale          39                       57.6650
Sale          80                       57.6000
Sale          22,973                   56.8500
Sale          2,287                    57.5146
Sale          170                      57.5550
Sale          18                       57.8225
Sale          120                      57.5550
Sale          124                      Transfer
Sale          100                      57.6525
Sale          70                       57.5550
Sale          13,612                   56.8472
Sale          150                      57.9575
Sale          18                       57.7100
Sale          15                       57.6253
Sale          111                      57.6000
Sale          125                      57.4932
Sale          20                       56.6575
Sale          190                      57.6925
Sale          138                      57.4225
Sale          2,034                    56.8500
Sale          160                      57.6000
Sale          172                      56.8500
Sale          10,900                   57.5158
Sale          220                      57.9575
Sale          10,188                   56.8500
Sale          4,600                    57.2404
Sale          80                       57.1850
Sale          87                       57.6000
Sale          110                      57.4725
Sale          300                      57.6150
Sale          100                      57.9575
Sale          36                       Transfer
Sale          110                      57.1850
Sale          200                      57.4725
Sale          270                      57.5550
Sale          85                       57.5551
Sale          70                       58.0926
Sale          127                      57.4132
Sale          120                      57.5550
Sale          19,066                   57.2188
Sale          170                      57.5550
Sale          5,246                    57.6885
Sale          150                      57.9575
Sale          43                       56.9849
Sale          50                       57.6000
Sale          60                       57.8000
Sale          6,762                    56.8500
Sale          275                      57.8213
Sale          205                      57.9425
Sale          75                       57.8000
Sale          70                       57.6000
Sale          155                      57.6000
Sale          30                       Transfer
Sale          859                      57.4996

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         4000          56.7872
CFD            Short         1200          57.1736
CFD            Short         8336          57.2313
CFD            Short         3103          57.2462
CFD            Short         2154          57.4755
CFD            Short         5567          57.6171
CFD            Long          43            56.9848
CFD            Long          19066         57.2187
CFD            Long          4600          57.2404
CFD            Long          2287          57.5145
CFD            Long          5246          57.6884


(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                         25 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   45,000                 54.0000          AMER           20/03/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   150                    4,000.0000       EURO           20/03/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   50                     5,400.0000       EURO           20/03/2008
Option            Purchased   -10                    5,200.0000       EURO           19/12/2008
Option            Purchased   -250                   5,200.0000       EURO           20/03/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -100,000               30.0000          AMER           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