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               14 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      26,225,180      2.70%    1,244,955       0.13%
securities
(2) Derivatives      250,805      0.03%      175,442       0.02%%
(other than
options)
(3) Options and        2,850      0.00%        2,000       0.00%
agreements to
purchase/sell
Total             26,478,835      2.73%    1,422,397       0.15%


(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      1,734                35.7513
Purchase      6,014                35.4262
Purchase      160                  35.0300
Purchase      13,409               34.9842
Purchase      190                  35.0300
Purchase      3,030                35.9700
Purchase      19,950               35.2733
Purchase      400                  34.8457
Purchase      7,080                35.9221
Purchase      1,022                35.9700
Purchase      42,452               35.3936
Purchase      519                  35.9800
Purchase      7,090                35.6425
Purchase      175                  35.0300
Purchase      2,109                35.9700
Purchase      27,527               35.3453
Purchase      82                   34.9944
Purchase      145                  35.0300
Purchase      400                  34.8457
Purchase      519                  35.9868
Purchase      519                  35.9800
Purchase      82                   34.9900
Purchase      315                  35.0300
Purchase      160                  35.0300
Purchase      100                  35.0300
Purchase      2,197                35.9700
Purchase      82                   34.9900
Purchase      14,306               35.9700
Purchase      135                  35.0300
Purchase      120                  35.0300
Purchase      3,898                35.9700
Purchase      190                  35.0300
Purchase      10,000               35.9700
Purchase      2,125                35.9700
Purchase      21,660               35.9700
Purchase      100                  35.0300
Purchase      84,367               35.4752
Purchase      15,430               35.4825
Purchase      41,933               35.3864
Purchase      135                  35.0300
Purchase      56,305               35.5167
Purchase      5,670                35.4795
Purchase      1,734                35.7513
Purchase      6,498                35.9700
Sale          1,022                35.9632
Sale          82                   34.9900
Sale          7,090                35.6393
Sale          519                  35.9800
Sale          519                  35.9800
Sale          84,367               35.4752
Sale          519                  35.9800
Sale          519                  35.9800
Sale          2,197                35.9700
Sale          1,339                35.9700
Sale          13,409               34.9842
Sale          7,080                35.9221
Sale          5,150                36.3651
Sale          2,109                35.9700
Sale          119,650              35.9700
Sale          41,933               35.3864
Sale          84,367               35.4752
Sale          15,430               35.4757
Sale          82                   34.9900
Sale          3,898                35.9700
Sale          19,950               35.2666
Sale          5,021                35.9700
Sale          3,192                35.9700
Sale          10,000               35.9700
Sale          5,670                35.4795
Sale          7,272                35.5122
Sale          6,014                35.4230
Sale          56,305               35.5167
Sale          3,433                34.6739
Sale          1,734                35.7513
Sale          5,670                35.4795
Sale          3,232                35.5122
Sale          2,307                34.6739
Sale          120                  35.6192
Sale          400                  34.8457
Sale          7,723                34.6739
Sale          27,527               35.3453
Sale          2,173                35.5122

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         400           34.8457
CFD            Short         13409         34.9842
CFD            Short         82            34.9943
CFD            Short         6014          35.4261
CFD            Short         15430         35.4824
CFD            Short         1734          35.7512
CFD            Short         7080          35.9221
CFD            Short         519           35.9868
CFD            Long          19950         35.2665
CFD            Long          5670          35.4795
CFD            Long          56305         35.5167
CFD            Long          7090          35.6392
CFD            Long          1022          35.9631
CFD            Long          519           35.98


(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                         17 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