The new deal will come into effect in 2018 and run until June 2034.

Poland is keen to diversify away from its reliance on Russian pipeline gas. Qatargas signed a long-term agreement with PGNiG in 2009 to sell 1.3 billion cubic metres of LNG from Qatar per annum. ­Deliveries began last June.

The LNG will be supplied from Qatargas 3, a joint venture between Qatar Petroleum, Conoco­Phillips, and Japan’s Mitsui.

Supplies will be delivered to a Polish LNG terminal in Swinoujscie.