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               12 June 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      47,267,884      4.74%       534,315      0.05%
securities
(2) Derivatives    2,800,633      0.28%       303,127      0.03%
(other than
options)
(3) Options and      101,961      0.01%       341,580      0.03%
agreements to
purchase/sell
Total             50,170,478      5.03%     1,179,022      0.12%


(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         3,900                  57.2434
Purchase         8,443                  58.2700
Purchase         467                    58.2700
Purchase         276,451                57.5455
Purchase         800                    57.8187
Purchase         28                     Transfer
Purchase         3,000                  57.6309
Purchase         6,296                  58.2700
Purchase         164,654                58.2700
Purchase         11,701                 57.3658
Purchase         8,399                  56.5112
Purchase         93,645                 57.7535
Purchase         42                     58.0783
Purchase         3,900                  57.2434
Purchase         37,599                 56.6919
Purchase         286                    55.7200
Purchase         20                     57.6355
Purchase         2,918                  57.9805
Purchase         970                    56.1168
Purchase         170                    56.9387
Purchase         217                    56.5200
Purchase         956                    56.1168
Purchase         294                    56.1168
Purchase         8,520                  58.2700
Purchase         172                    56.1168
Sale             105                    57.1705
Sale             16,492                 58.0686
Sale             200                    58.0675
Sale             285                    57.8200
Sale             32,946                 57.9735
Sale             66                     73.0000 EUR
Sale             1,486                  57.8100
Sale             177                    57.2926
Sale             9,997                  57.9878
Sale             200                    58.1460
Sale             3                      58.0633
Sale             210                    57.7258
Sale             34,810                 57.1443
Sale             30                     Transfer
Sale             588                    57.2901
Sale             3,900                  57.2449
Sale             150                    58.1610
Sale             276,451                57.5455
Sale             41,312                 58.2700
Sale             8,700                  57.9435
Sale             3,318                  58.2700
Sale             1,832                  57.2898
Sale             125                    58.1015
Sale             100                    58.1015
Sale             6,624                  58.2700
Sale             428                    56.7427
Sale             28                     Transfer

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          225           56.9449
CFD            Long          8358          56.9674
CFD            Long          34810         57.1442
CFD            Long          276451        57.5455
CFD            Long          317           57.8912
CFD            Long          8700          57.9434
CFD            Long          32946         57.9735
CFD            Long          9997          57.9878
CFD            Long          3             58.0633
CFD            Long          16492         58.0686
CFD            Long          41312         58.27
CFD            Long          21213         58.2817
CFD            Short         8399          56.5112
CFD            Short         37599         56.6919
CFD            Short         3900          57.2434
CFD            Short         11701         57.3658
CFD            Short         276451        57.5455
CFD            Short         3000          57.6309
CFD            Short         93645         57.7535
CFD            Short         800           57.8186

(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                         13 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                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
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                    3,000.0000       EURO           20/06/2008
Option            Purchased   250                    3,800.0000       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                   5,200.0000       EURO           19/09/2008

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