One of the UK’s biggest oil and gas producers is planning to retrench from the North Sea as the Government prepares to hike tax on companies which operate in the area.

Harbour Energy has put its stakes in the Armada, Everest, Lomond, Catcher, and Tolmount fields up for sale to cut its exposure to the area, news agency Reuters has reported, citing sources with knowledge of the matter. It comes as Chancellor Rachel Reeves prepares to increase the energy profits levy – popularly known as the windfall tax – on the sector in the Budget on Wednesday (October 30).

The levy was introduced by the previous UK Government in May 2022 in response to the extraordinary profits that North Sea oil and gas companies began to make in the aftermath of Russia’s full-scale invasion of Ukraine, which caused global gas prices to spike.


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After taking power in July, the Labour Government pledged to increase the rate of the levy to 38% from 35% from November, lifting the headline rate of tax on upstream oil and gas activities to 78%. It also plans to extend the period over which the levy applies to March 31, 2030, and remove some of the investment allowances originally brought in alongside the tax.

Industry players have become increasingly vocal about the impact of the policy, with Aberdeen & Grampian Chamber of Commerce warning earlier this month that confidence in the sector has plunged to an “all-time” low. Its chief executive Russell Borthwick declared that Prime Minister Sir Keir Starmer’s plans for the energy profits levy are having a “chilling effect on the sector”.

Harbour has been a vocal critic of the windfall tax since day one, and slashed hundreds of jobs following its introduction in 2022.

As well as a sale of North Sea assets, Reuters reported that Harbour was resurrecting plans to acquire a listed company in the US to allow it to move its listing and headquarters across the Atlantic from London.

Harbour declined to comment on the sale process when contacted by Reuters, telling the agency that it was focused on integrating Wintershall DEA, which it acquired earlier this year.