Norwegian, which filed for bankruptcy protection (examinership) in Ireland last month, is also reported to have asked investors for another £340 million cash injection.

Despite the plunge in passengers last month, Norwegian said Christmas bookings “look promising” and the airline has added another 62 flights over the festive period.

Jacob Schram, Norwegian’s chief executive, said: “The pandemic continues to have a negative impact on our business as travel restrictions remain.

“The development of vaccines is great news for the airline industry, and we look forward to welcoming more customers onboard as travel restrictions are lifted.”

Schram added that bookings for summer 2021 were increasing with consumers “slowly beginning to plan for their summer holidays”.

Norwegian has sought bankruptcy protection in Ireland because this is where its aircraft assets are held. The airline’s latest emergency refinancing efforts are due to be put to investors at a general meeting on 17 December.