Annual Information Update

Tullow Oil PLC 08 May 2006 Tullow Oil plc 8 May 2006 Tullow Oil plc (the 'Company') Annual Information Update for the 12 months up to and including 8 May 2006 In accordance with Prospectus Rule 5.2 the Company gives notice that the following information has been published or made available to the public over the previous 12 months. 1. Regulatory Announcements The following regulatory announcements have been made by the Company via RNS, a Regulatory Information Service: Date of Announcement Regulatory Headline 8 May 2006 Blocklisting Interim Review 3 May 2006 Document Availability 28 April 2006 Director/PDMR Shareholding 7 April 2006 Director/PDMR Shareholding 5 April 2006 Director/PDMR Shareholding 3 April 2006 Director's Awards 3 April 2006 Director's Awards 29 March 2006 Director Declaration 29 March 2006 Preliminary Results 13 March 2006 Uganda Well Update 7 March 2006 Uganda Well Update 16 February 2006 Management Change 31 January 2006 Trading Statement 24 January 2006 Holding in Company 17 January 2006 Well Update 6 January 2006 Joint Corporate Brokers 6 January 2006 Farm-in Agreement 4 January 2006 Director Shareholding/PDMR 4 January 2006 Director Shareholding/PDMR 21 December 2005 Director Shareholding/PDMR 20 December 2005 Wells Update 16 December 2005 Holding in Company 6 December 2050 Drilling & Acquisition Update 25 November 2005 Brochure of Particulars 17 November 2005 Holding in Company 11 November 2005 Farm-in agreement 7 November 2005 Blocklisting Interim Review 12 October 2005 Analyst Visit Notification 6 October 2005 Holding in Company 4 October 2005 Director/PDMR Shareholding 14 September 2005 Interim Results 13 September 2005 Holding(s) in Company 25 August 2005 First Gas from Munro 24 August 2005 Holding(s) in Company 23 August 2005 IFRS Statement 2 August 2005 Holding(s) in Company 27 July 2005 Holdings in Company 13 July 2005 Trading Statement 5 July 2005 Director Shareholding 5 July 2005 Transactions of Directors etc. 29 June 2005 AGM Resolutions 29 June 2005 AGM Statement 14 June 2005 UK Business Unit Update 7 June 2005 Holding in Company 27 May 2005 Holding(s) in Company 24 May 2005 Annual Report and Accounts 9 May 2005 Dividend Timetable Copies of the documents published via RNS may be obtained from the Regulatory News Service provided by the London Stock Exchange (www.londonstockexchange.com/en-gb/pricesnew) market news under code TLW and at the Company's website at www.tullowoil.com. 2. Documents filed with the Registrar of Companies The following documents have been filed by the Company with the Registrar of Companies at Companies House: Date of Filing Type Description of Document 27 April 2006 88(2)R Return of Allotment of Shares (2) 18 April 2006 288a Appointment of Director 24 March 2006 363s Annual Return made up to 4 February 2006 23 February 2006 88(2)R Return of Allotment of Shares (2) 18 January 2006 88(2)R Return of Allotment of Shares (2) 20 December 2005 88(2)R Return of Allotment of Shares(2) 27 October 2005 88(2)R Return of Allotment of Shares (2) 20 September 2005 403a Declaration of Mortgage/Charge (6) 20 September 2005 88(2)R Return of Allotment of Shares 2 September 2005 395 Particulars of Mortgage/Charge (3) 19 August 2005 88(2)R Return of Allotment of Shares (2) 5 August 2005 AA Report and Accounts for year end 31 December 2004 26 July 2005 287 Registered Office change 19 July 2005 RES 11 Certified copy of Resolution disapplying pre-emption rights 2 July 2005 395 Particulars of Mortgage/Charge 17 June 2005 88(2)R Return of Allotment of Shares 12 May 2005 88(2)R Return of Allotment of Shares Copies of the documents listed above can be obtained from Companies House, Crown Way, Cardiff CF14 3UZ (email: enquiries@companies-house.gov.uk) or, if you are a registered user, through Companies House Direct at www.direct.companieshouse.gov.uk. 3. Documents sent to shareholders or lodged with the UKLA and Irish Stock Exchange Document Viewing Facilities The following documents have been sent to the Company's shareholders and lodged with the UKLA and Irish Stock Exchange Document Viewing Facilities: Date Brief description of Document(s) 3 May 2006 2005 Annual Report and Accounts and Circular regarding the 2006 Annual General Meeting 3 Oct 2005 2005 Interim Report 24 May 2005 2004 Annual Report and Accounts and Circular regarding the 2005 Annual General Meeting Copies of these documents may be viewed at the UK Listing Authority's Document Viewing Facility which is situated at Financial Services Authority, 25 The North Colonnade, Canary Wharf, London, E14 5HS and at the Irish Stock Exhange's Document Viewing Facility which is situated at 28 Anglesea Street, Dublin 2, Ireland. The information referred to in this update was current at the time of publication but some information may now be out of date. The Company does not undertake any obligation to update any such information in the future. No representation is made as to the accuracy or the completeness of such information and neither this Annual Information Update, nor the information referred to above, constitutes an offer of any securities nor a recommendation in respect of any securities Copies of this Annual Information Update and the documents referred to within it are held at and can be obtained from the Company Secretary at the registered office of the Company, 3rd Floor, Building 11, Chiswick Park, 566 Chiswick High Road, London W4 5YS. Inquiries Tom Hickey + 44 208 996 1000 This announcement has been issued through the Companies Announcement Service of The Irish Stock Exchange. This information is provided by RNS The company news service from the London Stock Exchange

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Tullow Oil (TLW)
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