Annual Information Update

RNS Number : 0487S

Tullow Oil PLC

11 May 2009

Tullow Oil plc (the 'Company')

Annual Information Update - 9 May 2008 to 8 May 2009

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 2009 Blocklisting update

6 May 2009 Nsoga Discovery

1 May 2009 Total Voting Rights

28 April 2009 Director/PDMR Shareholding

9 April 2009 Annual Financial Report

2 April 2009 Director/PDMR Shareholding

1 April 2009 Total Voting Rights - Replacement

31 March 2009 Total Voting Rights

31 March 2009 Director/PDMR Shareholding

30 March 2009 Holding(s) in Company

25 March 2009 Drilling Update

18 March 2009 Director/PDMR Shareholding

11 March 2009 2008 Full Year Results Part I

11 March 2009 2008 Full Year Results Part II

9 March 2009 Banking Facility

9 March 2009 Drilling Update

6 March 2009 Holding(s) in Company

2 March 2009 Total Voting Rights

23 February 2009 Holding(s) in Company

20 February 2009 Holding(s) in Company

19 February 2009 Holding(s) in Company

5 February 2009 Well Update

2 February 2009 Total Voting Rights

30 January 2009 Holding(s) in Company - Replacement

28 January 2009 Holding(s) in Company

26 January 2009 Irish Stock Exchange Main Market Notice

23 January 2009 Holding(s) in Company

21 January 2009 Pricing

21 January 2009 Trading Statement and Operational Update

21 January 2009 Issue of Equity

16 January 2009 Director/PDMR Shareholding

14 January 2009 Holding(s) in Company

13 January 2009 Holding(s) in Company

13 January 2009 Heritage Oil Ltd Uganda Drilling Update

13 January 2009 Drilling Update

12 January 2009 Well update

8 January 2009 Drilling Update

6 January 2009 Director/PDMR Shareholding

5 January 2009 Director/PDMR Shareholding

31 December 2008 Total Voting Rights

16 December 2008 Well Update

16 December 2008 Successful Buffalo-1 Exploration

11 December 2008 Drilling Update

1 December 2008 Total Voting Rights

1 December 2008 Hewett - Bacton Completion

27 November 2008 Holding(s) in Company

20 November 2008 Successful Ebony

19 November 2008 Holding(s) in Company

18 November 2008 Holding(s) in Company

12 November 2008 Interim Management Statement

11 November 2008 Holding(s) in Company - Replacement

11 November 2008 Holding(s) in Company

7 November 2008 Irish Stock Exchange Main Market Notice

5 November 2008 Blocklisting Return

5 November 2008 Holding(s) in Company

3 November 2008 Total Voting Rights

31 October 2008 Holding(s) in Company

31 October 2008 Issue of Equity

30 October 2008 Holding(s) in Company

29 October 2008 Holding(s) in Company

23 October 2008 Drilling Update

22 October 2008 Holding(s) in Company

21 October 2008 Drilling Update

14 October 2008 Holding(s) in Company

6 October 2008 Holding(s) in Company

2 October 2008 Director/PDMR Shareholding

1 October 2008 Total Voting Rights

1 October 2008 Tullow Oil plc Capital Market

24 September 2008 Holding(s) in Company

16 September 2008 Drilling Update

9 September 2008 Well Update

3 September 2008 Well Test Results

1 September 2008 Director/PDMR Shareholding

27 August 2008 Half Yearly Results - Part 2

27 August 2008 Half Yearly Results - Part 1

27 August 2008 Appointment of Chief Financial Officer

6 August 2008 Exploration Update

6 August 2008 Heritage Oil Ltd Drilling Report

30 July 2008 Well Result

28 July 2008 Holding(s) in Company

10 July 2008 Drilling Update

9 July 2008 Trading Statement

3 July 2008 Director/PDMR Shareholding

1 July 2008 Total Voting Rights

30 June 2008 Director Share Dealing

30 June 2008 Drilling Update

30 June 2008 Heritage Oil Ltd Drilling Update

24 June 2008 Drilling Update

10 June 2008 Mahogany-2 appraisal well flow

10 June 2008 Proposed Sale of Hewett Unit

4 June 2008 Holding(s) in Company

3 June 2008 Total Voting Rights

29 May 2008 Holding(s) in Company

27 May 2008 Irish Stock Exchange Main Market Notice

21 May 2008 Brochure of Particulars

16 May 2008 Awards of Shares

14 May 2008 Annual General Meeting

14 May 2008 Board Appointment - Ann Grant

14 May 2008 Interim Management Statement

13 May 2008 Well Update

9 May 2008 Annual Information Update

Copies of the documents published via RNS may be obtained from the Regulatory News Service provided by the London Stock Exchange (www.londonstockexchange.com/rns) 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

23 April 2009 88(2) Return of Allotment of shares

4 April 2009 288c Director's Particulars David Bamford

26 March 2009 395 Particulars of Mortgage / Charge

24 March 2009 395 Particulars of Mortgage / Charge

23 March 2009 363a Annual Return made up to 04/02/2009

12 March 2009 88(2) Return of Allotment of shares

5 March 2009 288c Director's Particulars Clare Spottiswoode

26 February 2009 SA Share Agreement OTC

26 February 2009 88(2) Return of Allotment of shares

15 January 2009 88(2) Return of Allotment of shares

8 December 2008 88(2) Return of Allotment of shares

3 December 2008 403a Declaration of satisfaction in full or part of a mortgage or charge

22 October 2008 88(2) Return of Allotment of shares

22 October 2008 MEM/ARTS Memorandum of Association and Articles of Association (Amended)

3 October 2008 MEM/ARTS Articles of Association

11 September 2008 288b Director resigned Thomas Hickey

11 September 2008 288a Director Appointed Ian Springett

25 July 2008 88(2) Return of Allotment of shares

11 June 2008 88(2) Return of Allotment of shares

4 June 2008 AA Group Accounts made up to 31 Dec 2007

23 May 2008 288a Director appointed Ann Grant

23 May 2008 RES01 Disapp Pre-Emption Rights 14/05/08

Authorise Allotment of Securities 14/05/08

Adopt Articles of Association 14/05/08

Copies of the documents listed above can be obtained from Companies House, Crown Way, Cardiff (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 UK Listing Authority and Irish Stock Exchange Document Viewing Facilities:

The following documents have been sent to the Company's shareholders and lodged with the UK Listing Authority and Irish Stock Exchange Document Viewing Facilities.

Date Brief Description of Document(s)

9 April 2009 2008 Annual Report and Accounts and Circular Regarding the 2009 Annual General

Meeting

9 April 2009 Year in Review to 31 December 2008

9 April 2009 Form of Proxy for 2009 Annual General Meeting

5 September 2008 Interim Results

Copies of these documents may be viewed at the Document Viewing Facilities of the UK Listing Authority at 25 The North Colonnade, Canary Wharf, London E14 5HS and of the Irish Stock Exchange at Irish Stock Exchange 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 to the accuracy or completeness of such information and neither this Annual Information Update, not 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.

Enquiries:

Graham Martin

Company Secretary

+44 208 996 1000

This information is provided by RNS

The company news service from the London Stock Exchange

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