Rule 8.3 - RIO TINTO

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               12 November 2007

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       47,292,069     4.74%    2,453,644      0.25%
securities
(2) Derivatives     4,462,713     0.45%    1,535,385      0.15%
(other than
options)
(3) Options and         3,206     0.00%      702,831      0.07%
agreements to
purchase/sell
Total              51,757,988     5.19%    4,691,860      0.47%


(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           Price per unit
                   Securities          (GBP)
Purchase           44,645              56.6121
Purchase           4,485               57.1501
Purchase           38,305              57.1501
Purchase           9,400               56.7622
Purchase           16,419              57.1501
Purchase           3,069               57.1501
Purchase           200,000             59.0220
Purchase           1,476               56.5800
Purchase           144,000             56.5800
Purchase           7,959               57.8913
Purchase           12,709              57.1501
Purchase           5,855               58.3277
Purchase           96,380              57.1501
Purchase           3,063               58.0744
Purchase           9,305               58.0744
Purchase           4,002               57.1501
Purchase           862                 56.0100
Purchase           3,330               58.0744
Purchase           9,367               57.1501
Purchase           2,218               57.0507
Purchase           2,294               56.4241
Purchase           10,436              57.1501
Purchase           7,423               57.0506
Purchase           4,590               58.7436
Purchase           103,652             58.07
Purchase           2,218               57.0506
Purchase           2,452               58.0744
Purchase           49,170              57.1501
Purchase           24,300              56.2400
Purchase           7,423               57.0507
Purchase           19,066              57.1501
Purchase           7,375               57.1501
Purchase           14,403              57.5727
Purchase           5,785               57.1501
Purchase           2,456               58.0744
Purchase           159                 54.0000
Purchase           10,122              58.2417
Purchase           2,190               58.0744
Purchase           200,000             59.0220
Purchase           12,917              57.0506
Purchase           1,044               58.0744
Purchase           139                 52.1458
Purchase           9,163               57.1501
Purchase           2,291               58.0744
Purchase           3,276               57.0506
Purchase           1,407               57.4956
Purchase           103,652             58.2403
Purchase           12,339              58.0744
Purchase           235,515             57.1504
Purchase           46,993              57.1501
Purchase           103,652             58.07
Purchase           3,276               57.0507
Purchase           4,313               58.0744
Sale               91                  58.8800
Sale               7,423               57.0506
Sale               100                 57.3020
Sale               65                  58.2150
Sale               80,020              57.0719
Sale               5,855               58.3277
Sale               762                 56.9900
Sale               120                 58.2225
Sale               150                 58.2875
Sale               139                 58.1500
Sale               52                  58.2050
Sale               401                 57.6145
Sale               5,022               57.5165
Sale               103                 57.0200
Sale               37                  58.0675
Sale               6                   58.1405
Sale               2,218               57.0506
Sale               6,225               57.9522
Sale               5,855               58.3277
Sale               187                 58.2200
Sale               18                  58.1425
Sale               137                 58.2150
Sale               150                 58.2050
Sale               3,276               57.0506
Sale               200                 57.9525
Sale               141,191             58.1670
Sale               108,371             58.2355
Sale               200,000             59.0220
Sale               203                 57.0975
Sale               110                 58.1350
Sale               82                  56.7750
Sale               199                 58.2500
Sale               742                 58.0750
Sale               7,022               57.8013
Sale               65                  58.2500
Sale               350                 58.9512
Sale               139                 52.1458
Sale               25,511              57.3342
Sale               1,900               56.3498
Sale               103,652             58.07
Sale               1,074               58.0131


(b)  Derivatives transactions (other than options)
Product name   Long/Short    Number of     Price per
                             Securities    unit
CFD            Short         2294 56.4241
CFD            Short         144000 56.58
CFD            Short         9400 56.7621
CFD            Short         1407 57.4955
CFD            Short         14403 57.5727
CFD            Short         6322 57.8096
CFD            Short         103652 58.06
CFD            Short         3800 58.9605
CFD            Short         200000 59.022
CFD            Long          762 56.99
CFD            Long          80020 57.0718
CFD            Long          25511 57.3342
CFD            Long          401 57.6145
CFD            Long          7022 57.8012
CFD            Long          6225 57.9522
CFD            Long          141191 58.167
CFD            Long          5855 58.3276
CFD            Long          651 58.773
CFD            Long          4144 58.8605
CFD            Long          17361 58.9487

(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                         13 November 2007
Contact name                               BARCLAYS COMPLIANCE
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)

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   250                    4,500.0000       EURO           21/12/2007
Option            Purchased   -300                   3,800.0000       EURO           20/06/2008
Option            Purchased   -250                   2,500.0000       EURO           20/06/2008
Option            Purchased   -250                   4,200.0000       EURO           16/11/2007
Option            Purchased   -225                   4,500.0000       EURO           16/11/2007
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   -306                   4,200.0000       EURO           21/12/2007
Option            Purchased   250                    3,800.0000       EURO           20/06/2008
Option            Purchased   -500                   4,400.0000       EURO           21/12/2007
Option            Purchased   306                    4,800.0000       EURO           21/12/2007
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   350                    4,600.0000       EURO           19/12/2008
Option            Purchased   450                    3,500.0000       EURO           21/12/2007
Option            Purchased   500                    5,200.0000       EURO           21/12/2007
Option            Purchased   -600,000               42.0000          AMER           21/12/2007
Option            Purchased   -100,000               30.0000          AMER           20/06/2008
Option            Purchased   -1,000                 3,500.0000       EURO           21/12/2007
Option            Purchased   250                    3,300.0000       EURO           21/12/2007

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