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               17 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      26,488,860      2.73%    1,004,533       0.10%
securities
(2) Derivatives      213,229      0.02%      175,427       0.02%
(other than
options)
(3) Options and        2,850      0.00%        2,000       0.00%
agreements to
purchase/sell
Total             26,704,939      2.75%    1,181,960       0.12%


(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      10,577               34.6614
Purchase      78,502               34.7907
Purchase      12,996               34.5700
Purchase      114,789              34.8457
Purchase      514                  34.7800
Purchase      9,361                34.5468
Purchase      1,000                34.7474
Purchase      80,128               34.7500
Purchase      80,128               34.7500
Purchase      700                  34.6729
Purchase      1,739                34.6252
Purchase      61,359               34.7850
Purchase      12,996               34.5700
Purchase      831                  34.7800
Purchase      118                  36.2864
Purchase      1,000                34.7474
Purchase      17,070               34.5020
Purchase      4,200                34.8092
Purchase      78,502               34.7907
Purchase      2,767                34.7598
Purchase      634                  34.7800
Purchase      4,200                34.8092
Purchase      2,020                35.9700
Purchase      1,600                34.4493
Purchase      49,087               34.7850
Purchase      43,841               34.5723
Purchase      543                  34.7800
Purchase      6,133                34.6888
Purchase      7,922                34.5059
Purchase      12,272               34.7850
Purchase      400                  34.5100
Purchase      66,374               34.8275
Sale          700                  34.6729
Sale          4,200                34.8092
Sale          1,600                34.4493
Sale          9,361                34.5402
Sale          1,000                34.7474
Sale          10,577               34.6614
Sale          17,070               34.5020
Sale          3,682                34.5700
Sale          43,841               34.5723
Sale          1,600                34.4493
Sale          43,841               34.5723
Sale          80,128               34.7500
Sale          400                  34.5038
Sale          3,337                34.6425
Sale          114,789              34.8457
Sale          1,739                34.6221
Sale          66,374               34.8275
Sale          6,133                34.6822
Sale          700                  34.6729
Sale          2,767                34.7567
Sale          200                  34.8524
Sale          160                  35.9663
Sale          7,922                34.4993
Sale          78,502               34.7907

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         9361          34.5467
CFD            Short         1000          34.7474
CFD            Short         2767          34.7597
CFD            Short         4200          34.8092
CFD            Short         66374         34.8274
CFD            Long          1600          34.4493
CFD            Long          7922          34.4993
CFD            Long          17070         34.502
CFD            Long          400           34.5038
CFD            Long          1739          34.622
CFD            Long          10577         34.6613
CFD            Long          700           34.6729
CFD            Long          6133          34.6821

(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                         18 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