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               14 July 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      47,101,288      4.72%       911,540      0.09%
securities
(2) Derivatives      644,698      0.06%     1,618,906      0.16%
(other than
options)
(3) Options and      101,200      0.01%         1,030      0.00%
agreements to
purchase/sell
Total             47,847,186      4.79%     2,531,476      0.25%

(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         600                   54.5772
Purchase         1,573                 55.2357
Purchase         5,245                 54.8468
Purchase         9,000                 55.2000
Purchase         17,097                54.8635
Purchase         581                   54.8717
Purchase         5,790                 54.5768
Purchase         6,800                 54.7769
Purchase         729                   55.1575
Purchase         425                   54.5700
Purchase         2,822                 54.3029
Purchase         3,560                 55.2953
Purchase         213                   54.7901
Purchase         16,248                54.5700
Purchase         336                   54.5700
Purchase         178                   53.9100
Purchase         426                   53.9100
Purchase         1,102                 54.5700
Sale             600                   54.5772
Sale             19                    55.3163
Sale             1,300                 54.9762
Sale             4,932                 54.7211
Sale             206                   54.3494
Sale             47                    55.0984
Sale             173                   55.2700
Sale             1,459                 54.7894
Sale             10                    53.9968
Sale             10,900                54.4621
Sale             21,249                55.0358
Sale             450                   54.7845
Sale             125                   55.3063
Sale             75                    54.3043
Sale             639                   54.0500
Sale             100                   55.1810
Sale             5,608                 54.7797
Sale             100                   55.2684
Sale             50                    54.4808
Sale             35                    55.1731
Sale             175                   55.3516
Sale             245                   54.2626
Sale             85                    54.7540
Sale             1,250                 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          206           54.3494
CFD            Long          10900         54.4621
CFD            Long          600           54.5772
CFD            Long          341           54.581
CFD            Long          4932          54.721
CFD            Long          5608          54.7796
CFD            Long          450           54.7845
CFD            Long          1459          54.7894
CFD            Long          1723          54.8066
CFD            Long          1300          54.9761
CFD            Long          21249         55.0358
CFD            Long          8718          55.349
CFD            Short         2822          54.3029
CFD            Short         5790          54.5768
CFD            Short         600           54.5772
CFD            Short         336           54.7648
CFD            Short         6800          54.7769
CFD            Short         5245          54.8467
CFD            Short         17097         54.8634
CFD            Short         581           54.8717
CFD            Short         729           55.1575

(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                         15 July 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.
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

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