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               24 April 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      45,803,252      4.59%     2,078,929      0.21%
securities
(2) Derivatives    3,332,482      0.33%        40,801      0.00%
(other than
options)
(3) Options and      101,450      0.01%       141,080      0.01%
agreements to
purchase/sell
Total             49,237,184      4.93%     2,260,810      0.23%


(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         42,408                61.9300
Purchase         700                   62.1817
Purchase         140,370               61.8651
Purchase         4,300                 62.2513
Purchase         2,166                 62.1901
Purchase         114                   Transfer
Purchase         3,334                 62.1628
Purchase         252                   63.4200
Purchase         18,796                61.8266
Purchase         4,019                 61.5998
Purchase         5                     63.6000
Purchase         15                    62.0276
Purchase         5,864                 62.2478
Purchase         5,200                 61.6984
Purchase         92                    Transfer
Purchase         42,408                61.7151
Purchase         2,687                 61.9300
Purchase         10,703                61.7978
Purchase         92                    Transfer
Purchase         4,229                 62.3170
Sale             14,400                61.9538
Sale             81                    61.5060
Sale             42,408                61.7151
Sale             30                    62.2045
Sale             10,162                62.0344
Sale             252                   63.5200
Sale             42,408                61.9300
Sale             6,938                 62.1328
Sale             252                   63.4200
Sale             79                    61.9705
Sale             8,467                 61.5474
Sale             23                    62.4300
Sale             92                    Transfer
Sale             40                    61.4760
Sale             4,797                 62.0690
Sale             976                   63.5982
Sale             2,400                 61.3558
Sale             250                   62.5200
Sale             10,648                63.5253
Sale             20,583                62.3184
Sale             15,104                61.9538
Sale             350                   61.4700
Sale             618                   61.9300
Sale             1,238                 61.4950
Sale             100                   77.0700 EUR
Sale             50                    62.5300
Sale             80                    62.2416
Sale             100                   62.3664
Sale             125                   61.5024
Sale             11,672                62.1922
Sale             100                   62.0624
Sale             9,217                 62.8146
Sale             600                   61.9300
Sale             114                   Transfer
Sale             70                    62.1929
Sale             7,512                 64.6400
Sale             99                    61.5824
Sale             3,322                 61.9300
Sale             100                   63.5932
Sale             75                    62.2900
Sale             75                    62.2900
Sale             981                   61.9300
Sale             300                   62.3430
Sale             90                    62.0632
Sale             35,519                61.8904
Sale             2,909                 61.9300

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          2400          61.3557
CFD            Long          8467          61.5474
CFD            Long          35519         61.8903
CFD            Long          10162         62.0343
CFD            Long          4797          62.069
CFD            Long          6938          62.1328
CFD            Long          20583         62.3184
CFD            Long          9217          62.8146
CFD            Short         4019          61.5998
CFD            Short         5200          61.6983
CFD            Short         10703         61.7977
CFD            Short         18796         61.8266
CFD            Short         183           62.0931
CFD            Short         3334          62.1627
CFD            Short         700           62.1817
CFD            Short         2166          62.1901
CFD            Short         5864          62.2477
CFD            Short         4300          62.2512
CFD            Short         4229          62.317
CFD            Short         156           63.361

(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 April 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   100,000                56.0000          AMER           18/12/2009
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   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   125                    4,400.0000       EURO           20/06/2008
Option            Purchased   -135                   5,200.0000       EURO           19/12/2008
Option            Purchased   -145                   5,200.0000       EURO           19/12/2008
Option            Purchased   -250                   5,200.0000       EURO           19/09/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -2,000                 70.0000          AMER           20/06/2008
Option            Purchased   -38,000                70.0000          AMER           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