Rule 8.3 - PREMIER OIL

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 PREMIER OIL Class of relevant security ORD GBP0.50 to which the dealings being disclosed relate (Note 2) Date of dealing 24 November 2006 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 1,676,499 2.05% 217,464 0.27% securities (2) Derivatives 217,464 0.27% 856,844 1.05% (other than options) (3) Options and 0 0.00% 0 0.00% agreements to purchase/sell Total 1,893,963 2.31% 1,074,308 1.31% (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 73 12.9726 Purchase 782 13.1300 Purchase 8,800 13.0636 Sale 1,835 12.8974 Sale 542 12.9674 Sale 8,500 12.9700 Sale 10,300 13.0348 (b) Derivatives transactions (other than options) Product Long/Short Number of Securities Price Per name, (Note 6) (Note 7) Unit (GBP) e.g. CFD CFD Short 73 12.9726 CFD Short 8800 13.0636 CFD Long 5013 12.76 CFD Long 5454 12.8723 CFD Long 1835 12.8974 CFD Long 542 12.9673 CFD Long 8500 12.9700 CFD Long 4221 13.0162 CFD Long 10300 13.0347 NB: The below transactions which were disclosed on 22/11/2006 have been cancelled Long/Short Number of Securities Price per unit (GBP) Long 10,908 12.8723 Long 10,026 12.76 (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 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) NO Date of disclosure 27 November 2006 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) Notes The Notes on Form 8.3 can be viewed on the Takeover Panel's website at www.thetakeoverpanel.org.uk

Companies

Barclays (BARC)
UK 100

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