Enquest Regulatory News (ENQ)

22 September 2017

ENQUEST PLC(the "Company")

The following prospectus and supplementary prospectus have been approved by the UK Listing Authority and is available for viewing:

Listing Document dated 19 September 2017 in respect of the issue of £5,614,875 7.00 per cent. Extendable PIK Toggle Notes due 15 April 2022 (the "Additional Notes") (to be consolidated and form a single series with the existing £160,424,998 7.00 per cent. Extendable PIK Toggle Notes originally due 15 February 2022, as extended to 15 April 2022 (the "Existing Notes")) under the Company's £500,000,000 Euro Medium Term Note Programme, as supplemented by a Supplementary Listing Document dated 22 September 2017.

The Listing Document and Supplementary Listing Document have been filed with the UK Listing Authority. To view the full documents, please paste the following URL into the address bar of your browser:

http://www.rns-pdf.londonstockexchange.com/rns/5907R_-2017-9-22.pdf

Copies of the documents, together with the documents incorporated by reference therein, will be submitted to the National Storage Mechanism and will shortly be available for inspection at www.morningstar.co.uk/uk/NSM.

The Additional Notes are expected to be admitted to the Official List of the UK Listing Authority and to trading on the order book for retail bonds segment of the regulated market of the London Stock Exchange plc on or about 27 September 2017. On or shortly following admission, the Additional Notes will be given the same permanent ISIN (XS0880578728) as that attributed to the Existing Notes.

For further information, please visit the Company's Investor Relations website at www.enquest.com/investors or contact:

Investor Relations

EnQuest PLC

Fifth Floor, Cunard House

15 Regent Street

London SW1Y 4LR

United Kingdom

Tel: +44 (0)20 7925 4900