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               16 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      47,170,760      4.73%       574,844      0.06%
securities
(2) Derivatives    2,839,392      0.28%       218,875      0.02%
(other than
options)
(3) Options and      101,450      0.01%       141,080      0.01%
agreements to
purchase/sell
Total             50,112,113      5.02%     1,135,299      0.11%


(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         416                   58.6164
Purchase         800                   59.2313
Purchase         694                   58.4318
Purchase         2,200                 58.8923
Purchase         8,920                 59.0288
Purchase         14,827                58.9603
Purchase         2,116                 58.8500
Purchase         1,999                 58.8500
Purchase         253                   58.6164
Purchase         3,000                 59.0089
Purchase         166                   Transfer
Purchase         6,664                 58.8500
Purchase         5,643                 58.9233
Purchase         84                    58.8500
Purchase         139                   59.0520
Purchase         32,580                58.8500
Purchase         314                   58.6164
Purchase         527                   58.6164
Purchase         414                   59.5338
Purchase         201                   58.6164
Purchase         230                   58.6164
Purchase         6,487                 58.8574
Purchase         276                   58.6164
Purchase         249                   58.6164
Purchase         247                   58.6164
Purchase         899                   57.6000
Purchase         611                   57.6000
Purchase         232                   58.6164
Purchase         79                    58.6164
Purchase         100                   76.1400 EUR
Sale             4,300                 59.1600
Sale             29,960                59.1724
Sale             13,656                59.8600
Sale             30                    59.3910
Sale             2,250                 58.0065
Sale             70                    59.5810
Sale             406                   Transfer
Sale             66                    58.4675
Sale             52                    59.4305
Sale             1,859                 58.0265
Sale             1,999                 58.8500
Sale             739                   58.8500
Sale             666                   58.8500
Sale             300                   58.8900
Sale             432                   58.4675
Sale             1,237                 58.8500
Sale             1,377                 58.8500
Sale             9,167                 58.8500
Sale             170                   58.9790
Sale             10,076                58.8500
Sale             400                   58.9000
Sale             98                    59.4250
Sale             2,780                 58.8500
Sale             100                   59.7820
Sale             6,356                 59.3992
Sale             99                    58.8800
Sale             40                    58.8000
Sale             30                    58.9327
Sale             75                    58.9700
Sale             2,925                 58.8754
Sale             700                   58.6789
Sale             100                   59.5019



(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          2250          58.0065
CFD            Long          700           58.6789
CFD            Long          2925          58.8754
CFD            Long          4300          59.16
CFD            Long          29960         59.1724
CFD            Long          5081          59.2702
CFD            Long          30            59.391
CFD            Long          13656         59.8599
CFD            Short         6487          58.8573
CFD            Short         2200          58.8922
CFD            Short         5643          58.9232
CFD            Short         14827         58.9602
CFD            Short         3000          59.0088
CFD            Short         8920          59.0288
CFD            Short         800           59.2312



(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                         17 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   -500                   7,000.0000       EURO           19/12/2008
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   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   500                    5,000.0000       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