Annual Information Update

RNS Number : 2872G

Tullow Oil PLC

10 May 2011

Tullow Oil plc (the 'Company')

Annual Information Update - 7 May 2010 to 6 May 2011

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

6 May 2011 Blocklisting Return

28 April 2011 Total Voting Rights

19 April 2011 Notice of AGM

13 April 2011 Well Update

7 April 2011 Annual Financial Report

4 April 2011 Director / PDMR Shareholding

1 April 2011 Director / PDMR Shareholding

31 March 2011 Total Voting Rights

30 March 2011 Uganda SPA Signed

28 March 2011 Well Update

18 March 2011 Director/PDMR Shareholding

15 March 2011 Uganda MoU signed

11 March 2011 Holding(s) in Company

11 March 2011 Director Declaration

9 March 2011 Appointment of Non-Executive Director

9 March 2011 2010 Full Year Results

3 March 2011 Well Update

28 February 2011 Total Voting Rights

16 February 2011 Mauritania Well update

10 February 2011 Ghana Well Update

7 February 2011 Change of Registered Office

31 January 2011 Total Voting Rights

27 January 2011 Trading Update

19 January 2011 Holding(s) in Company - CORRECTION

19 January 2011 Holding(s) in Company

10 January 2011 Ghana Well Update

10 January 2011 Mauritania Well Update

6 January 2011 Director / PDMR Shareholding

31 December 2010 Total Voting Rights

15 December 2010 First Oil - Ghana

7 December 2010 Director / PDMR Shareholding

30 November 2010 Total Voting Rights

29 November 2010 Jubilee First Oil - 15 Dec 2010

15 November 2010 Well Update

10 November 2010 Interim Management Statement

4 November 2009 Blocklisting Return

1 November 2010 Total Voting Rights

21 October 2010 Well Update

15 October 2010 Additional Debt Funding

4 October 2010 Director/PDMR Shareholding

30 September 2010 Total Voting Rights

13 September 2010 Well Update

2 September 2010 Acquisition

31 August 2010 Total Voting Rights

26 August 2010 Director Declaration

25 August 2010 Appointment of Non-Executive Director

25 August 2010 2010 Half Yearly Results

2 August 2010 Total Voting Rights

28 July 2010 Well Update

27 July 2010 Completion of Acquisition

26 July 2010 Well Update

15 July 2010 Well Result

7 July 2010 Uganda Pre-Emption Approval

6 July 2010 Presentational Currency

6 July 2010 Trading Statement and Operational Update

2 July 2010 Holding(s) in Company

2 July 2010 Director / PDMR Shareholding

1 July 2010 Director / PDMR Shareholding

1 July 2010 Ghana Capital Markets Day

1 July 2010 Total Voting Rights

24 June 2010 Update on Exercise of Option in Tanzania

14 June 2010 Director Declaration

9 June 2010 Well Result

28 May 2010 Total Voting Rights

19 May 2010 Exploration Update

17 May 2010 New Deepwater Licence in Suriname

14 May 2010 Issue of Shares

12 May 2010 Result of AGM

12 May 2010 Interim Management Statement

10 May 2010 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

13 April 2011 MG01 Particulars of a Mortgage / Charge No:44

13 April 2011 MG01 Particulars of a Mortgage / Charge No:43

13 April 2011 MG01 Particulars of a Mortgage / Charge No:42

13 April 2011 MG01 Particulars of a Mortgage / Charge No:41

14 March 2011 AR01 Annual Return

11 March 2011 SH01 Statement of Capital

10 March 2011 SH01 Statement of Capital

10 March 2010 SH01 Statement of Capital

4 March 2011 SH01 Statement of Capital

7 February 2011 AD01 Change of Registered Address

22 December 2010 SH01 Statement of Capital

25 October 2010 SH01 Statement of Capital

13 October 2010 SH01 Statement of Capital

27 August 2010 AP01 Director Appointment

16 July 2010 SH01 Statement of Capital

15 July 2010 SH01 Statement of Capital

14 July 2010 SH01 Statement of Capital

16 June 2010 AA Group Accounts

26 May 2010 RES 10 Authorised Allotment of Shares and Debentures

26 May 2010 RES 01 Alteration to Memorandum and Articles

26 May 2010 RES 13 Authority to hold General Meetings

19 May 2010 SH01 Statement of Capital

7 May 2010 MG01 Particulars of Mortgage / Charge No: 37

7 May 2010 MG01 Particulars of Mortgage / Charge No: 38

7 May 2010 MG01 Particulars of Mortgage / Charge No: 39

7 May 2010 MG01 Particulars of Mortgage / Charge No: 40

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:

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

Date Brief Description of Document(s)

12 April 2011 2010 Annual Report and Accounts and Circular Regarding the 2011 Annual General Meeting

12 April 2011 Year in Review to 31 December 2010

12 April 2011 Form of Proxy for 2011 Annual General Meeting

19 April 2011 Notice of General Meeting

Copies of these documents were submitted to the National Storage Mechanism and are available for viewing at www.hemscott.com/nsm.do and at the 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, 9, Chiswick Park, 566 Chiswick High Road, London, W4 5XT.

Enquiries:

Graham Martin

Company Secretary

+44 203 249 9000

This information is provided by RNS

The company news service from the London Stock Exchange

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