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               14 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      45,810,948      4.59%     2,168,783      0.22%
securities
(2) Derivatives    2,999,357      0.30%        41,579      0.00%
(other than
options)
(3) Options and      141,450      0.01%       101,080      0.01%
agreements to
purchase/sell
Total             48,951,755      4.91%      2,311,442     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         28                    Transfer
Purchase         2,000                 57.9399
Purchase         214                   59.5591
Purchase         1,300                 58.4450
Purchase         1,700                 59.0198
Purchase         1,834                 58.0393
Purchase         4,190                 58.2200
Purchase         4,800                 58.5361
Purchase         332                   58.2200
Purchase         4,436                 58.2200
Purchase         4,000                 58.3970
Purchase         3,761                 58.0353
Purchase         516                   58.1883
Purchase         1,400                 58.4760
Purchase         1,695                 57.4827
Purchase         334                   58.0276
Purchase         466                   58.0276
Purchase         3,195                 58.2819
Purchase         223                   58.0276
Purchase         2,100                 58.3656
Purchase         342                   58.0276
Purchase         221                   58.0276
Purchase         331                   59.6600
Purchase         338                   59.6600
Purchase         211                   58.0276
Purchase         1,684                 58.0276
Purchase         10,798                58.2200
Purchase         228                   58.0276
Sale             34,137                57.5966
Sale             54                    58.0200
Sale             194                   58.2113
Sale             214                   59.5591
Sale             1,997                 58.1400
Sale             39                    57.9548
Sale             40,673                57.5456
Sale             2,800                 58.3532
Sale             7,600                 58.2078
Sale             3,225                 58.2200
Sale             40                    58.3000
Sale             3,762                 57.6067
Sale             3,195                 58.2819
Sale             54                    58.0339
Sale             100                   57.6024
Sale             150                   58.3500
Sale             265                   57.6100
Sale             323                   57.9000
Sale             85                    58.4320
Sale             100                   57.5500
Sale             3,707                 57.9542
Sale             65                    58.3000
Sale             1,700                 57.7380
Sale             376                   59.9500
Sale             3,877                 57.7215
Sale             1,212                 58.1500
Sale             15,655                57.5199
Sale             5,925                 57.7032
Sale             716                   58.0339


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          15655         57.5199
CFD            Long          40673         57.5456
CFD            Long          34137         57.5966
CFD            Long          5925          57.7032
CFD            Long          3877          57.7215
CFD            Long          3707          57.9541
CFD            Long          7600          58.2078
CFD            Long          194           58.2112
CFD            Long          2800          58.3531
CFD            Short         2000          57.9399
CFD            Short         3761          58.0352
CFD            Short         2100          58.3656
CFD            Short         4000          58.397
CFD            Short         1300          58.445
CFD            Short         1400          58.476
CFD            Short         4800          58.5361


(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                         15 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   20,000                 52.0000          AMER           18/04/2008
Option            Purchased   20,000                 54.0000          AMER           18/04/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       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   -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