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               02 September 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      46,773,828       4.69%      544,957      0.05%
securities
(2) Derivatives      517,872       0.05%    1,978,246      0.20%
(other than
options)
(3) Options and      101,200       0.01%      101,400      0.01%
agreements to
purchase/sell
Total             47,392,900       4.75%    2,624,603      0.26%


(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                 36                       47.77
Purchase                 300                      48.05
Purchase                 250                      48.05
Purchase                 83,069                   48.2184
Purchase                 536                      48.07
Purchase                 389                      47.94
Purchase                 300                      48.04
Purchase                 355                      48.08
Purchase                 808                      48.08
Purchase                 117                      47.87
Purchase                 77,455                   48.1389
Purchase                 9,500                    52.1681
Purchase                 5,826                    51.6737
Purchase                 428                      48.02
Purchase                 393                      47.77
Purchase                 593                      47.82
Purchase                 921                      47.77
Purchase                 311                      47.73
Purchase                 778                      48.09
Purchase                 418                      47.77
Purchase                 753                      47.82
Purchase                 1,513                    48.11
Purchase                 163                      47.82
Purchase                 176                      48.11
Purchase                 1,037                    47.83
Purchase                 1,599                    47.77
Purchase                 1,280                    47.95
Purchase                 257                      47.95
Purchase                 628                      48.02
Purchase                 6                        48.08
Purchase                 632                      48.04
Purchase                 80                       48.05
Purchase                 545                      48.06
Purchase                 390                      48.07
Purchase                 963                      47.8
Purchase                 546                      47.85
Purchase                 915                      47.76
Purchase                 13,500                   48.2657
Purchase                 159                      48.06
Purchase                 790                      48.04
Purchase                 899                      47.75
Purchase                 42,000                   50.1173
Purchase                 300                      48.04
Purchase                 150,000                  50.1
Purchase                 42                       48.05
Purchase                 153                      47.9
Purchase                 448                      48.05
Purchase                 342                      47.82
Purchase                 1,010                    47.82
Purchase                 20                       47.77
Purchase                 274                      47.9
Purchase                 2,045                    48.06
Purchase                 205                      48
Purchase                 468                      48.1
Purchase                 300                      48.05
Purchase                 886                      48.07
Purchase                 42                       48.05
Purchase                 573                      48
Purchase                 259                      47.77
Purchase                 437                      47.9
Purchase                 102                      48.07
Purchase                 210                      48.03
Purchase                 1,528                    48.09
Purchase                 100                      48.04
Purchase                 2                        47.74
Purchase                 102                      47.76
Purchase                 6                        48.08
Purchase                 570                      47.87
Purchase                 2,837                    51.5381
Purchase                 70,000                   48.2422
Purchase                 300                      51.1633
Purchase                 300                      48
Purchase                 1,689                    48.1
Purchase                 5,000                    48.3
Purchase                 337                      48.11
Purchase                 260                      48.07
Purchase                 197                      47.95
Purchase                 298                      48.05
Purchase                 427                      47.74
Purchase                 635                      47.77
Purchase                 865                      48.11
Purchase                 459                      48.07
Purchase                 1,015                    47.9
Purchase                 6                        48.08
Purchase                 1,000                    51.6258
Purchase                 671                      Transfer
Purchase                 28                       48.03
Purchase                 255                      48.07
Purchase                 1,800                    51.803
Purchase                 42                       48.05
Purchase                 700                      48.07
Purchase                 696                      48.0129
Purchase                 468                      48.09
Purchase                 500                      48.1
Purchase                 238                      47.9
Purchase                 400                      48.185
Purchase                 4,481                    48.4464
Purchase                 697                      48.09
Purchase                 158                      48
Purchase                 576                      48.06
Purchase                 507                      48.04
Purchase                 1,176                    48.1
Purchase                 604                      47.77
Purchase                 1,459                    48.04
Purchase                 1,173                    47.7
Purchase                 133                      47.71
Purchase                 587                      48.07
Purchase                 889                      48.11
Purchase                 200                      48.03
Purchase                 8,984                    52.29
Purchase                 200                      59.15
Purchase                 791                      48.3
Purchase                 330                      48.09
Purchase                 13,677                   48.3493
Purchase                 2,260                    48.5844
Purchase                 16                       48.04
Purchase                 500                      48.04
Purchase                 6                        48.08
Purchase                 1,000                    48.39
Purchase                 781                      48.03
Purchase                 14,170                   50.0576
Purchase                 1,116                    48.08
Purchase                 400                      48.08
Purchase                 13                       47.89
Purchase                 163                      47.9
Purchase                 6                        48.08
Purchase                 477                      47.85
Purchase                 1,322                    51.3189
Purchase                 6,539                    48.2291
Purchase                 1,092                    47.7
Purchase                 129                      48.06
Purchase                 890                      48.07
Purchase                 945                      47.83
Purchase                 402                      47.95
Purchase                 400                      48.07
Purchase                 1,322                    48.11
Purchase                 473                      48.11
Purchase                 103                      47.82
Purchase                 300                      48.05
Purchase                 713                      48.08
Purchase                 300                      48.04
Purchase                 1,072                    48.05
Purchase                 1,309                    48.04
Purchase                 305                      47.9
Purchase                 230                      48.04
Purchase                 1,000                    48.6594
Purchase                 72,292                   51.1968
Purchase                 810                      48.06
Purchase                 525                      48
Purchase                 6                        48.08
Purchase                 40,000                   47.7936
Purchase                 608                      48.01
Purchase                 183                      47.9
Purchase                 87                       47.77
Purchase                 300                      48
Purchase                 105                      47.83
Purchase                 1,347                    48.07
Sale                     75                       48.036
Sale                     40,000                   47.7936
Sale                     49,662                   48.1915
Sale                     5,200                    48.2396
Sale                     1,545                    51.6753
Sale                     37                       48.09
Sale                     9                        48.006
Sale                     685                      48.03
Sale                     150,000                  50.1
Sale                     62                       48.354
Sale                     93                       48.3
Sale                     8,770                    48.3
Sale                     58                       48.03
Sale                     40                       48.74
Sale                     21,679                   50.1
Sale                     689                      48.03
Sale                     26,704                   48.3
Sale                     75,534                   48.364
Sale                     181                      51.4775
Sale                     52,388                   50.6494
Sale                     20,315                   51.1388
Sale                     500                      48.1
Sale                     400                      48.185
Sale                     41                       51.7175
Sale                     1,499                    48.3855
Sale                     40                       49.3075
Sale                     102                      48.163
Sale                     244                      47.9096
Sale                     11                       51.7275
Sale                     40,000                   47.7936
Sale                     2,228                    50.1617
Sale                     300                      51.1633
Sale                     6,293                    48.0349
Sale                     2,898                    48.294
Sale                     28,747                   48.1632
Sale                     19                       51.0645
Sale                     8,000                    50.5349




(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          40000         47.7935
CFD            Long          244           47.9095
CFD            Long          6293          48.0349
CFD            Long          28747         48.1632
CFD            Long          400           48.185
CFD            Long          49662         48.1915
CFD            Long          6827          48.2396
CFD            Long          2898          48.2939
CFD            Long          206           48.3097
CFD            Long          1499          48.3854
CFD            Short         696           48.0128
CFD            Short         77455         48.1388
CFD            Short         400           48.185
CFD            Short         83069         48.2183
CFD            Short         6539          48.229
CFD            Short         70000         48.2421
CFD            Short         13500         48.2657
CFD            Short         13677         48.3493
CFD            Short         4481          48.4464
CFD            Short         2260          48.5844
CFD            Short         1000          48.6593

(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                         03 September 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   -100,000               64.0000          AMER           21/11/2008
Option            Purchased   350                    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   150                    5,000.0000       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   -150                   7,000.0000       EURO           19/12/2008
Option            Purchased   -270                   6,400.0000       EURO           19/12/2008
Option            Purchased   -350                   7,000.0000       EURO           19/12/2008
Option            Purchased   -350                   5,000.0000       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