Rule 8.3 - XSTRATA 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              XSTRATA PLC
Class of relevant security    ORD USD0.50
to which the dealings being
disclosed relate (Note 2)
Date of dealing               12 December 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      26,383,089      2.72%    1,070,014       0.11%
securities
(2) Derivatives      121,904      0.01%      169,882       0.02%
(other than
options)
(3) Options and        2,850      0.00%        2,000       0.00%
agreements to
purchase/sell
Total             26,507,843      2.73%    1,241,896       0.13%


(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      5,502                37.0782
Purchase      22,941               36.5600
Purchase      992                  37.0570
Purchase      2,000                36.8970
Purchase      2,100                37.0500
Purchase      1,173                37.1755
Purchase      156                  37.5000
Purchase      14,663               37.0489
Purchase      589                  37.5000
Purchase      2,000                36.8900
Purchase      5,502                37.0782
Purchase      68,396               36.9628
Purchase      6,498                37.0500
Purchase      3,266                37.1328
Purchase      536                  36.9512
Purchase      15,000               37.1800
Purchase      42,632               37.0499
Purchase      1,190                36.8328
Sale          41,472               36.9226
Sale          9,485                36.7639
Sale          5,502                37.0782
Sale          2,619                37.3744
Sale          2,000                36.8900
Sale          18,699               37.0126
Sale          124                  36.9550
Sale          14,663               37.0560
Sale          2,000                36.8900
Sale          2,166                37.0500
Sale          9,485                36.7639
Sale          141,595              37.3800
Sale          52,542               37.0500

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         2000          36.897
CFD            Short         68396         36.9628
CFD            Short         14663         37.0488
CFD            Short         42632         37.0498
CFD            Short         992           37.057
CFD            Short         5502          37.0782
CFD            Short         3266          37.1328
CFD            Short         1173          37.1754
CFD            Long          2000          36.89
CFD            Long          41472         36.9225
CFD            Long          18699         37.0126
CFD            Long          52542         37.05
CFD            Long          14663         37.0559
CFD            Long          281           37.2066
CFD            Long          2338          37.3945


(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 December 2007
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   550                    3,600.0000       EURO           21/12/2007
Option            Purchased   500                    3,400.0000       EURO           20/03/2008
Option            Purchased   500                    3,200.0000       EURO           21/12/2007
Option            Purchased   400                    3,800.0000       EURO           20/06/2008
Option            Purchased   250                    3,000.0000       EURO           21/12/2007
Option            Purchased   250                    3,200.0000       EURO           20/03/2008
Option            Purchased   250                    3,200.0000       EURO           20/03/2008
Option            Purchased   150                    4,000.0000       EURO           20/06/2008
Option            Purchased   -250                   3,300.0000       EURO           21/12/2007
Option            Purchased   -250                   3,100.0000       EURO           21/12/2007
Option            Purchased   -500                   3,400.0000       EURO           21/12/2007
Option            Purchased   -500                   3,600.0000       EURO           20/06/2008
Option            Purchased   -500                   3,200.0000       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