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               18 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      46,792,534      4.69%       553,113      0.06%
securities
(2) Derivatives    2,817,658      0.28%        76,749      0.01%
(other than
options)
(3) Options and      101,961      0.01%       341,580      0.03%
agreements to
purchase/sell
Total             49,712,153      4.98%       971,442      0.10%


(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         1,000                 59.6300
Purchase         965                   59.6100
Purchase         443                   59.8400
Purchase         293                   59.6800
Purchase         15,401                59.9997
Purchase         258                   59.7300
Purchase         69                    59.6700
Purchase         189                   59.6600
Purchase         146                   59.5800
Purchase         1,000                 59.5700
Purchase         303                   59.6300
Purchase         643                   59.6100
Purchase         896                   59.6300
Purchase         6,500                 60.0392
Purchase         193                   59.5800
Purchase         452                   59.7100
Purchase         483                   59.7400
Purchase         390                   59.8000
Purchase         213                   59.6700
Purchase         202                   59.4900
Purchase         443                   59.8400
Purchase         290                   59.4900
Purchase         5,300                 60.8916
Purchase         144                   59.6100
Purchase         203                   59.5700
Purchase         279                   59.5800
Purchase         3,800                 60.7855
Purchase         774                   59.5700
Purchase         226                   59.7300
Purchase         202                   59.4900
Purchase         334                   59.8000
Purchase         215                   59.5800
Purchase         100                   59.5800
Purchase         1,164                 60.3060
Purchase         637                   59.5200
Purchase         300                   59.5700
Purchase         175                   59.5800
Purchase         579                   59.4900
Purchase         258                   59.6400
Purchase         144                   59.7300
Purchase         34                    59.7100
Purchase         100                   59.4900
Purchase         213                   59.5800
Purchase         74                    59.7100
Purchase         323                   59.5600
Purchase         100                   59.5800
Purchase         800                   60.7691
Purchase         106                   59.7000
Purchase         968                   59.6300
Purchase         1,800                 59.9973
Purchase         354                   59.5700
Purchase         696                   59.7200
Purchase         100                   59.5900
Purchase         43                    59.7000
Purchase         139                   59.8000
Purchase         258                   59.6300
Purchase         114                   59.8400
Purchase         114                   59.7300
Purchase         382                   59.7000
Purchase         226                   59.7300
Purchase         332                   59.5800
Purchase         171                   59.5800
Purchase         257                   59.7000
Purchase         610                   59.8000
Purchase         400                   59.5700
Purchase         44                    59.6700
Purchase         1,659                 60.8800
Purchase         10,391                60.6149
Purchase         17,919                60.8800
Purchase         30                    75.1000 EUR
Purchase         12,727                58.8500
Purchase         396                   59.5500
Purchase         18                    59.5900
Purchase         1,000                 59.5000
Purchase         161                   59.6700
Purchase         97                    59.5700
Purchase         1,000                 59.8600
Purchase         24                    59.4900
Purchase         118                   59.7000
Purchase         406                   59.6300
Purchase         280                   59.5900
Purchase         148                   59.5800
Purchase         1,000                 59.7200
Sale             75                    60.4045
Sale             142                   61.1875
Sale             100                   59.9675
Sale             122                   59.8100
Sale             75                    59.7031
Sale             1,104                 60.8800
Sale             250                   60.2230
Sale             150                   60.6180
Sale             60                    59.6575
Sale             12,727                58.8500
Sale             2                     75.7900 EUR
Sale             1                     60.4400
Sale             13,141                60.2428
Sale             979                   60.6600
Sale             166                   60.5375
Sale             14,142                60.3931
Sale             100                   60.0090
Sale             171                   60.2215
Sale             25,888                59.9179
Sale             24,247                59.6624
Sale             6,000                 60.2258
Sale             88                    59.9700
Sale             3,785                 59.8580
Sale             84,438                60.8800
Sale             16,672                60.6275
Sale             19,635                60.7467
Sale             5,208                 60.5204
Sale             97                    60.0535
Sale             19,590                60.8800
Sale             150                   60.0830


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          3785          59.858
CFD            Long          25888         59.9178
CFD            Long          6000          60.2258
CFD            Long          13141         60.2427
CFD            Long          14142         60.393
CFD            Long          1             60.44
CFD            Long          5208          60.5203
CFD            Long          16672         60.6274
CFD            Long          19635         60.7466
CFD            Short         1800          59.9972
CFD            Short         15401         59.9997
CFD            Short         6500          60.0392
CFD            Short         701           60.1239
CFD            Short         1164          60.306
CFD            Short         800           60.7691
CFD            Short         3800          60.7855
CFD            Short         5300          60.8915


(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                         19 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                   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   500                    5,000.0000       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