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               30 May 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      46,809,741      4.69%       999,406      0.10%
securities
(2) Derivatives    2,755,606      0.28%       185,987      0.02%
(other than
options)
(3) Options and      101,461      0.01%       341,080      0.03%
agreements to
purchase/sell
Total             49,666,808      4.98%     1,526,473      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         10,548                60.5500
Purchase         173,938               60.5500
Purchase         1,877                 59.0756
Purchase         2,917                 60.5439
Purchase         514                   60.5500
Purchase         8,362                 60.7690
Purchase         6,890                 60.5500
Purchase         31,033                60.7806
Purchase         549                   60.1563
Purchase         130                   60.8165
Purchase         11,381                60.5500
Purchase         6,218                 60.8409
Purchase         10,260                60.1800
Purchase         6,268                 60.1800
Purchase         2,618                 60.5500
Purchase         672                   60.5500
Purchase         3,816                 60.5500
Purchase         4,006                 61.1639
Purchase         595                   61.1639
Purchase         16,681                60.5500
Purchase         6,890                 60.5500
Purchase         7,086                 60.8430
Purchase         2,864                 60.5500
Purchase         322                   60.5500
Purchase         1,434                 60.5500
Purchase         922                   60.5500
Purchase         10,821                60.5638
Purchase         21,617                60.1800
Purchase         234                   60.5500
Purchase         549                   60.1600
Purchase         7,246                 60.8038
Purchase         21,285                60.1593
Purchase         375                   60.4800
Purchase         18,825                60.7994
Purchase         750                   60.2900
Purchase         126                   61.8000
Purchase         6,895                 61.0512
Purchase         23,948                60.6489
Purchase         288                   60.5500
Sale             1,295                 60.5500
Sale             111                   60.6671
Sale             635                   60.5561
Sale             135                   60.5500
Sale             46                    60.6671
Sale             264                   60.5561
Sale             6,508                 60.5561
Sale             2,690                 60.6095
Sale             54                    60.5500
Sale             18,439                60.6095
Sale             6,936                 60.6095
Sale             1,107                 60.6095
Sale             1,381                 60.5500
Sale             7,488                 60.6671
Sale             30                    60.7340
Sale             13,544                60.5500
Sale             20                    60.6671
Sale             116                   60.5561
Sale             42,432                60.5561
Sale             25                    60.5500
Sale             1,436                 59.9800
Sale             304                   Transfer
Sale             5,500                 60.5500
Sale             2,300                 60.0236
Sale             41,163                60.7264
Sale             549                   60.1600
Sale             125                   120.7800 USD
Sale             4,500                 60.6234
Sale             21                    60.7300
Sale             7,212                 59.8343
Sale             50                    60.7736
Sale             20                    60.7530
Sale             150                   60.7735
Sale             1,148                 60.6671
Sale             50                    60.6490
Sale             50                    60.5720
Sale             363                   60.5561
Sale             63                    60.6671
Sale             50                    60.7736
Sale             9,450                 60.5500
Sale             1,903                 60.5561
Sale             335                   60.6671
Sale             1,444                 60.5500
Sale             6,808                 60.5561
Sale             1,201                 60.6671
Sale             10,548                60.5500
Sale             103                   60.5500
Sale             128                   60.5561
Sale             100                   60.8530
Sale             90                    60.6760
Sale             100                   60.6132
Sale             175                   60.6820
Sale             2,209                 60.6500
Sale             373                   60.5621
Sale             6,890                 60.5500
Sale             542                   60.6095
Sale             85                    60.6671
Sale             483                   60.5561
Sale             168                   60.5500
Sale             85                    60.3824
Sale             210                   60.6095
Sale             719                   60.6095
Sale             398                   60.5500
Sale             562                   60.5500
Sale             1,407                 60.5707
Sale             721                   60.6095
Sale             870                   60.5707
Sale             1,563                 60.5707
Sale             2,680                 60.5707
Sale             763                   60.5500
Sale             110                   61.0004
Sale             2,973                 60.5500
Sale             22                    60.6671
Sale             1,975                 60.5707
Sale             12,561                60.5500
Sale             34,233                60.5500
Sale             406                   60.6428
Sale             495                   60.5707
Sale             823                   60.5707
Sale             10,437                60.5707
Sale             171                   60.5707
Sale             27                    60.5500
Sale             124                   60.6671
Sale             709                   60.5561
Sale             570                   60.5500
Sale             567                   60.6095
Sale             120                   60.5500
Sale             399                   60.5500
Sale             11,381                60.5500
Sale             159                   60.5561
Sale             444                   60.5707
Sale             399                   60.5561
Sale             85                    60.5500
Sale             70                    60.6671
Sale             323                   60.6095
Sale             735                   60.5707
Sale             740                   60.6095
Sale             2,360                 60.5707
Sale             250                   60.5561
Sale             44                    60.6671
Sale             53                    60.5500
Sale             27,352                60.5561
Sale             5,803                 60.5500
Sale             4,826                 60.6671
Sale             28                    60.6671
Sale             2,522                 60.5707
Sale             479                   60.6095
Sale             2,629                 60.6095
Sale             112                   60.6095
Sale             306                   60.5707
Sale             631                   60.5290
Sale             125                   60.8324
Sale             975                   60.6095
Sale             1,862                 60.6095

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          7212          59.8342
CFD            Long          1436          59.98
CFD            Long          2300          60.0236
CFD            Long          787           60.5622
CFD            Long          4500          60.6233
CFD            Long          41163         60.7263
CFD            Long          204           60.9034
CFD            Short         1877          59.0756
CFD            Short         718           60.5525
CFD            Short         10821         60.5637
CFD            Short         23948         60.6488
CFD            Short         8362          60.769
CFD            Short         31033         60.7806
CFD            Short         18825         60.7994
CFD            Short         7246          60.8038
CFD            Short         6218          60.8409
CFD            Short         7086          60.843

(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                         02 June 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   -135                   5,200.0000       EURO           19/12/2008
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -38,000                70.0000          AMER           20/06/2008
Option            Purchased   -10,000                74.0000          AMER           20/06/2008
Option            Purchased   -2,000                 70.0000          AMER           20/06/2008
Option            Purchased   -300                   5,200.0000       EURO           19/09/2008
Option            Purchased   -190,000               74.0000          AMER           20/06/2008
Option            Purchased   -145                   5,200.0000       EURO           19/12/2008
Option            Purchased   100,000                56.0000          AMER           18/12/2009
Option            Purchased   11                     7,600.0000       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   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       EURO           20/06/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   -250                   2,500.0000       EURO           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