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               20 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      44,661,140      4.47%     1,044,112      0.10%
securities
(2) Derivatives      812,241      0.08%     2,220,645      0.22%
(other than
options)
(3) Options and      101,200      0.01%         1,030      0.00%
agreements to
purchase/sell
Total             45,574,581      4.57%     3,265,787      0.33%


(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         4,844                 59.8000
Purchase         655                   Transfer
Purchase         11,000                59.7000
Purchase         193                   Transfer
Purchase         569                   60.3700
Purchase         43,058                59.8000
Purchase         912                   59.8000
Purchase         250,000               38.0000
Purchase         26,182                60.2486
Purchase         1,000                 60.4590
Purchase         2,182                 59.9701
Purchase         256                   59.8000
Purchase         2,732                 59.7929
Purchase         548                   59.8000
Purchase         2,536                 59.8308
Purchase         196                   59.8000
Purchase         299                   59.8000
Purchase         850                   59.8000
Purchase         1,429                 59.8000
Purchase         658                   59.8000
Purchase         58                    59.8000
Purchase         165                   59.8000
Purchase         311                   59.8000
Purchase         141                   59.8000
Purchase         329                   59.8000
Purchase         1,131                 60.7800
Purchase         204                   59.8000
Purchase         1,916                 60.1977
Purchase         1,392                 60.6895
Purchase         43,970                59.8000
Purchase         800                   59.7705
Purchase         453                   59.8000
Purchase         12,881                59.8000
Purchase         125,000               44.0000
Purchase         1                     59.8000
Purchase         2,030                 59.9224
Purchase         101                   59.8000
Purchase         12,864                60.0324
Purchase         633                   60.0000
Sale             43,970                59.8000
Sale             19,113                59.7988
Sale             113                   59.9212
Sale             250                   59.7675
Sale             140                   60.3660
Sale             30                    60.0723
Sale             5,526                 59.8000
Sale             482                   59.8000
Sale             145                   59.7330
Sale             8                     59.8000
Sale             60                    60.3800
Sale             60                    60.0300
Sale             50                    59.5136
Sale             8,581                 59.8000
Sale             125                   60.4324
Sale             548                   59.8000
Sale             100                   59.9436
Sale             1,182                 59.9026
Sale             77                    60.1323
Sale             57                    59.7675
Sale             682                   59.8000
Sale             120                   60.1916
Sale             19,642                59.6769
Sale             10,300                60.1175
Sale             140                   Transfer
Sale             64,498                59.8136
Sale             17,800                59.5060
Sale             139,000               59.8000
Sale             378                   59.8000
Sale             32                    61.0115
Sale             26,182                59.7708
Sale             73                    60.6305
Sale             3,500                 60.0718
Sale             38                    60.0630
Sale             65                    59.9125
Sale             2,466                 60.6012
Sale             150                   59.7900
Sale             31                    59.9375
Sale             912                   59.8000
Sale             337,752               60.2501
Sale             2,481                 59.8098
Sale             10,900                60.2395
Sale             379,971               60.2501
Sale             1,962                 59.7823
Sale             140                   60.3890
Sale             50,663                59.9547
Sale             218                   59.8000
Sale             4,583                 60.1058


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          17800         59.506
CFD            Long          19642         59.6768
CFD            Long          12417         59.7302
CFD            Long          26182         59.7707
CFD            Long          1962          59.7823
CFD            Long          150           59.79
CFD            Long          19113         59.7987
CFD            Long          2481          59.8098
CFD            Long          64498         59.8136
CFD            Long          3500          60.0718
CFD            Long          4583          60.1058
CFD            Long          10300         60.1174
CFD            Long          2466          60.6011
CFD            Short         800           59.7704
CFD            Short         2732          59.7928
CFD            Short         2536          59.8308
CFD            Short         2030          59.9223
CFD            Short         2182          59.9701
CFD            Short         12864         60.0324
CFD            Short         1916          60.1977
CFD            Short         26182         60.2485
CFD            Short         569           60.37
CFD            Short         1000          60.459
CFD            Short         1392          60.6894

(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                         23 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   100,000                56.0000          AMER           18/12/2009
Option            Purchased   500                    5,000.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
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   -500                   7,000.0000       EURO           19/12/2008

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