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               11 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      45,889,299      4.60%     2,030,738      0.20%
securities
(2) Derivatives    2,861,312      0.29%        62,741      0.01%
(other than
options)
(3) Options and      141,450      0.01%       101,080      0.01%
agreements to
purchase/sell
Total             48,892,061      4.90%     2,194,559      0.22%


(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         7,045                 58.6264
Purchase         9,600                 58.3203
Purchase         726                   59.0000
Purchase         315                   59.0000
Purchase         1,693                 59.0000
Purchase         271                   59.0000
Purchase         870                   59.0000
Purchase         2,618                 58.1421
Purchase         339                   59.0000
Purchase         309                   59.0000
Purchase         3,082                 59.0000
Purchase         98                    59.2616
Purchase         377                   59.0000
Purchase         169                   59.3300
Purchase         72                    58.8190
Purchase         14,621                59.0000
Purchase         198                   58.8190
Purchase         5,190                 59.0000
Purchase         600                   57.9800
Purchase         652                   59.0000
Purchase         519                   58.3240
Purchase         2,580                 58.1487
Purchase         7,247                 58.8912
Purchase         8,000                 58.5481
Purchase         35,659                59.2188
Sale             70                    59.4700
Sale             60                    58.5100
Sale             80                    59.9400
Sale             75                    60.0200
Sale             60                    59.9400
Sale             27                    58.8257
Sale             75                    58.5100
Sale             307                   59.0866
Sale             28                    58.8257
Sale             20                    58.5100
Sale             21                    58.8257
Sale             2,158                 58.8923
Sale             24                    58.8257
Sale             176                   58.8257
Sale             458                   58.8257
Sale             150                   59.9200
Sale             807                   59.0000
Sale             500                   59.2067
Sale             300                   58.9100
Sale             265                   58.9100
Sale             50                    58.5100
Sale             20                    58.8257
Sale             43                    59.3520
Sale             2,900                 58.9413
Sale             89                    59.3200
Sale             4,511                 59.0371
Sale             385                   59.3200
Sale             158                   59.4000
Sale             258                   59.4900
Sale             43                    59.8400
Sale             5,077                 59.1221
Sale             2,187                 59.1597
Sale             100                   58.5100
Sale             446                   58.9600
Sale             110                   58.3600
Sale             327                   59.0000
Sale             3,548                 Transfer
Sale             3,617                 58.5215
Sale             132                   Transfer
Sale             67,004                59.4300
Sale             75                    58.5100
Sale             30                    58.5100
Sale             200                   58.5100
Sale             35                    58.5100
Sale             60                    58.5100
Sale             290                   59.3200


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          3617          58.5214
CFD            Long          2158          58.8922
CFD            Long          2900          58.9413
CFD            Long          446           58.96
CFD            Long          4511          59.0371
CFD            Long          307           59.0866
CFD            Long          5077          59.122
CFD            Long          500           59.2067
CFD            Long          67004         59.4299
CFD            Short         600           57.98
CFD            Short         2580          58.1487
CFD            Short         9600          58.3203
CFD            Short         519           58.324
CFD            Short         8000          58.5481
CFD            Short         7045          58.6264
CFD            Short         7247          58.8912
CFD            Short         35659         59.2187


(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                         14 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