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               21 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      27,281,209      2.81%      587,685       0.06%
securities
(2) Derivatives      190,185      0.02%      171,669       0.02%
(other than
options)
(3) Options and        1,550      0.00%          500       0.00%
agreements to
purchase/sell
Total             27,472,944      2.83%      759,854       0.08%


(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      193,787              35.7284
Purchase      153,929              35.8500
Purchase      1,293                35.8979
Purchase      3,960                36.0000
Purchase      1,056                36.0000
Purchase      2,049                35.8331
Purchase      66,389               35.3255
Purchase      51,971               35.6268
Purchase      290                  36.0000
Purchase      11,443               36.0000
Purchase      69,906               35.9189
Purchase      2,455                36.0000
Purchase      69,906               35.9189
Purchase      2,600                35.9797
Purchase      437                  36.0000
Purchase      10,221               35.8500
Purchase      45,643               35.5914
Purchase      695                  36.0000
Purchase      12,996               36.0000
Purchase      2,904                36.0000
Purchase      6                    36.0000
Purchase      42,177               35.8500
Purchase      500,000              32.0000
Purchase      6,564                36.0000
Purchase      2,600                35.9797
Purchase      8,664                36.0000
Purchase      585                  35.9851
Purchase      30,075               35.8523
Purchase      8,664                34.9500
Purchase      3,300                35.7215
Purchase      200,000              36.0000
Purchase      203                  36.0000
Purchase      29                   36.0000
Purchase      4,687                35.8432
Purchase      209,236              35.8157
Purchase      75,000               36.0000
Purchase      38,538               35.9744
Sale          2,486                35.8624
Sale          38,538               35.9744
Sale          75,000               36.0000
Sale          10,221               35.8500
Sale          66,389               35.3255
Sale          168                  35.5800
Sale          3,300                35.7215
Sale          500,000              34.0000
Sale          4,687                35.8363
Sale          51,971               35.6268
Sale          45,643               35.5914
Sale          585                  35.9819
Sale          42,177               35.8500
Sale          4,436                36.0000
Sale          2,049                35.8331
Sale          437                  36.0000
Sale          30,075               35.8490
Sale          1,056                35.9932
Sale          69,906               35.9189
Sale          209,236              35.8157
Sale          1,293                35.8911
Sale          6,844                36.0000
Sale          250,000              31.0000
Sale          51,971               35.6268
Sale          2,600                35.9797
Sale          2,908                36.0000
Sale          3,300                35.7215


(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         1698          35.589
CFD            Short         28377         35.868
CFD            Short         1293          35.8979
CFD            Short         38538         35.9744
CFD            Short         2600          35.9797
CFD            Long          45643         35.5913
CFD            Long          3300          35.7215
CFD            Long          100           35.7268
CFD            Long          4687          35.8363
CFD            Long          1056          35.9931
CFD            Long          485           36.0344


(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                         24 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   500                    3,400.0000       EURO           20/03/2008
Option            Purchased   400                    3,800.0000       EURO           20/06/2008
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   -500                   3,600.0000       EURO           20/06/2008


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