Form 8.3 - DANA PETROLEUM PLC - AMENDMENT

FORM 8.3 AMENDMENT PUBLIC OPENING POSITION DISCLOSURE/DEALING DISCLOSURE BY A PERSON WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE Rule 8.3 of the Takeover Code (the "Code") 1. KEY INFORMATION (a) Identity of the person whose positions/dealings are being disclosed: BARCLAYS PLC (b) Owner or controller of interests and short positions disclosed, if different from 1(a): The naming of nominee or vehicle companies is insufficient (c) Name of offeror/offeree in relation to whose relevant securities this form relates: DANA PETROLEUM PLC Use a separate form for each offeror/offeree (d) If an exempt fund manager connected with an offeror/offeree, state this and specify identity of offeror/offeree: (e) Date position held/dealing undertaken: 6 July 2010 (f) Has the discloser previously disclosed, or are they today disclosing, NO under the Code in respect of any other party to this offer? 2. POSITIONS OF THE PERSON MAKING THE DISCLOSURE (a) Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates following the dealing (if any) Class of relevant security: Ordinary Interests Short positions Number % Number % (1) Relevant securities owned and/or 966,085 1.04% 263,790 0.29% controlled: (2) Derivatives (other than options): 241,340 0.26% (3) Options and agreements to purchase/sell: TOTAL: 1,207,425 1.30% 263,790 0.29% Class of relevant security: Convertible Bond GBP Interests Short positions Number % Number % (1) Relevant securities owned and/or 300,000 0.21 controlled: (2) Derivatives (other than options): (3) Options and agreements to purchase/sell: TOTAL: 300,000 0.21 All interests and all short positions should be disclosed. Details of any open derivative or option positions, or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8 (Open Positions). (b) Rights to subscribe for new securities (including directors' and other executive options) Class of relevant security in relation to which subscription right exists: Details, including nature of the rights concerned and relevant percentages: If there are positions or rights to subscribe to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2(a) or (b) (as appropriate) for each additional class of relevant security. 3. DEALINGS (IF ANY) BY THE PERSON MAKING THE DISCLOSURE (a) Purchases and sales Class of relevant Purchase/sale Number of securities Price per unit security ORD Purchase 100 14.4109 GBP ORD Purchase 100 14.4214 GBP ORD Purchase 210 14.3614 GBP ORD Purchase 274 14.3950 GBP ORD Purchase 308 14.4809 GBP ORD Purchase 400 14.4350 GBP ORD Purchase 420 14.3750 GBP ORD Purchase 482 14.4009 GBP ORD Purchase 616 14.4900 GBP ORD Purchase 907 14.4200 GBP ORD Purchase 917 14.4294 GBP ORD Purchase 964 14.4100 GBP ORD Purchase 1,287 14.4318 GBP ORD Purchase 1,852 14.4056 GBP ORD Purchase 2,287 14.4112 GBP ORD Purchase 2,673 14.4192 GBP ORD Purchase 3,680 14.4466 GBP ORD Purchase 10,945 14.4094 GBP ORD Purchase 11,331 14.4297 GBP ORD Sale 137 14.3964 GBP ORD Sale 274 14.3950 GBP ORD Sale 385 14.3800 GBP ORD Sale 400 14.4350 GBP ORD Sale 420 14.3750 GBP ORD Sale 465 14.4500 GBP ORD Sale 616 14.4900 GBP ORD Sale 654 14.5300 GBP ORD Sale 964 14.4100 GBP ORD Sale 1,526 14.5327 GBP ORD Sale 3,793 14.4346 GBP ORD Sale 5,635 14.5281 GBP (b) Derivatives transactions (other than options) Class of Product Nature of Number of relevant description dealing e.g. reference Price per security e.g. CFD opening/closing securities unit a long/short position, increasing/reducing a long/short position ORD CFD Long 5,635 14.5281 GBP ORD CFD Short 917 14.4294 GBP ORD CFD Short 3,680 14.4466 GBP ORD CFD Short 11,331 14.4297 GBP (c) Options transactions in respect of existing securities (i) Writing, selling, purchasing or varying Class of Product Writing, Number of Exercise Type Expiry date Option money relevant description purchasing, securities to price per e.g. paid/ security e.g. call selling, varying which option unit American, received per option etc. relates European unit etc. (ii) Exercising Class of relevant security Product description Number of securities Exercise price per unit e.g. call option (d) Other dealings (including subscribing for new securities) Class of relevant Nature of dealing Details Price per unit (if security e.g. subscription, conversion applicable) The currency of all prices and other monetary amounts should be stated. Where there have been dealings in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 3(a), (b), (c) or (d) (as appropriate) for each additional class of relevant security dealt in. 4. OTHER INFORMATION (a) Indemnity and other dealing arrangements Details of any indemnity or option arrangement, or any agreement or understanding, formal or informal, relating to relevant securities which may be an inducement to deal or refrain from dealing entered into by the person making the disclosure and any party to the offer or any person acting in concert with a party to the offer: If there are no such agreements, arrangements or understandings, state "none" (b) Agreements, arrangements or understandings relating to options or derivatives Details of any agreement, arrangement or understanding, formal or informal, between the person making the disclosure and any other person relating to: (i)the voting rights of any relevant securities under any option; or (ii)the voting rights or future acquisition or disposal of any relevant securities to which any derivative is referenced: If there are no such agreements, arrangements or understandings, state "none" (c) Attachments Is a Supplemental Form 8 (Open Positions) attached? NO Date of disclosure: 12 July 2010 Contact name: Geoff Smith Telephone number: 020 7116 2913 Public disclosures under Rule 8 of the Code must be made to a Regulatory Information Service and must also be emailed to the Takeover Panel at monitoring@disclosure.org.uk

Companies

Barclays (BARC)
UK 100

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