Business

Launch of accelerated placing of shares in Harbour

Not for release, publication or distribution, in whole or in part, directly or indirectly, in or into the United States, Australia, Canada, Japan or South Africa or in any other jurisdiction in which the release, publication or distribution would be unlawful or require registration.

This announcement does not constitute an offer to sell or the solicitation of an offer to purchase the securities described herein, nor shall there be any sale of the securities referred to herein in or into any jurisdiction where such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.

Proposed secondary placing of ordinary shares in Harbour Energy PLC ("Harbour" or the "Company")

Potomac View Investments, L.P. (the "Seller"), an entity managed by EIG Management Company, LLC ("EIG"), announces its intention to sell approximately 60 million ordinary shares in Harbour (the "Placing Shares"), representing approximately 3.8% of the Company's issued share capital, through a placing of ordinary shares to institutional investors (the "Placing").

The price per Placing Share and the final number of Placing Shares to be placed will be determined by way of an accelerated bookbuilding process. The bookbuilding period will commence immediately following this announcement and may close at any time on short notice. The results of the Placing will be announced as soon as practicable thereafter.

Barclays Bank PLC is acting as Sole Global Co-ordinator and Sole Bookrunner on the Placing (the "Sole Global Co-ordinator").

The Seller currently holds 114,775,572 ordinary shares in the Company representing approximately 7.3% of the Company's issued share capital. Any of the shares in the Company held by the Seller which are not sold in the Placing will be subject to a 90-day lock-up undertaking, which will be subject to customary exceptions and may be waived with the consent of the Sole Global Co-ordinator.

The Company is not party to the Placing and will not receive any proceeds from the Placing.

Barclays                                                           +44 (0)207623 2323

Sole Global Co-ordinator and Sole Bookrunner
Mike Powell

This announcement is not for distribution, directly or indirectly, in or into the United States (including its territories and possessions, any state of the United States and the District of Columbia, the "United States"), Australia, Canada, Japan or South Africa or any other jurisdiction in which the distribution or announcement would be unlawful. The distribution of this announcement and the offer and sale of the shares in certain jurisdictions may be restricted by law and persons into whose possession this announcement or other information referred to herein comes should inform themselves about and observe any such restriction. Any failure to comply with these restrictions may constitute a violation of the securities laws of any such jurisdiction.