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               23 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      45,771,304      4.59%     2,124,261      0.21%
securities
(2) Derivatives    3,283,346      0.33%        30,098      0.00%
(other than
options)
(3) Options and      101,450      0.01%       141,080      0.01%
agreements to
purchase/sell
Total             49,156,100      4.93%      2,295,439     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         30                    Transfer
Purchase         1,964                 Transfer
Purchase         408                   64.1506
Purchase         3,400                 64.0817
Purchase         236                   64.1100
Purchase         72,332                64.5931
Purchase         15,000                64.4924
Purchase         292                   63.8326
Purchase         3,825                 63.8083
Purchase         670                   Transfer
Purchase         14,290                63.6933
Purchase         154                   63.8326
Purchase         35                    64.1797
Purchase         140,540               64.5421
Sale             30                    Transfer
Sale             5,864                 64.6303
Sale             154                   64.3575
Sale             19                    63.7600
Sale             8,109                 64.2764
Sale             220                   Transfer
Sale             504                   64.6074
Sale             21,747                64.6773
Sale             4                     64.6300
Sale             75                    63.5145
Sale             10,069                63.8738
Sale             36                    63.4235
Sale             32                    64.3230
Sale             20,911                63.7399
Sale             12,908                64.5413
Sale             54,070                64.2644
Sale             32                    64.2560
Sale             59,424                64.6043
Sale             175                   63.7435
Sale             389                   64.6400
Sale             6,787                 64.3300
Sale             5,907                 64.6400
Sale             50                    80.5000 EUR
Sale             91                    79.0400 EUR
Sale             150                   64.3075
Sale             70                    63.3029
Sale             100                   64.1836
Sale             125                   63.4660
Sale             350                   64.5000
Sale             222                   63.7435
Sale             115                   64.4575
Sale             110                   63.7824
Sale             300                   64.5245
Sale             60                    63.5432
Sale             60                    63.5432
Sale             157                   63.7435
Sale             157                   63.7435
Sale             200                   64.3132
Sale             100                   64.1840
Sale             60                    63.9140
Sale             70                    64.1646
Sale             100                   64.8515
Sale             200                   64.2505
Sale             100                   64.6028
Sale             72,332                64.5931
Sale             200                   64.3075

NB: The below transactions which were previously disclosed have been cancelled
Deal Date    Purchase/Sale   Number of Securities    Price per unit (GBP)
23/04/2008   Sale            60                      63.5432

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          20911         63.7398
CFD            Long          10069         63.8737
CFD            Long          54070         64.2644
CFD            Long          8109          64.2764
CFD            Long          504           64.6073
CFD            Long          5864          64.6303
CFD            Short         14290         63.6932
CFD            Short         3825          63.8082
CFD            Short         3400          64.0816
CFD            Short         408           64.1505
CFD            Short         35            64.1797

(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)
CALL            Purchase          40000               70       AMER             20/06/08    2.6775

(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                         24 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