'It's a win-win!' Budget airline rejects climate concerns to extend controversial 'all you can fly' scheme

A similar number of passes were sold out within two days when the scheme first launched in August.

Váradi claimed there had been "huge demand", leading to calls for an expansion in the next few months.

However, eco-campaigners argue that the scheme is "grotesque".

Despite the concerns, Váradi said: "We are working on an ‘all you can fly’ 2.0 and we should have some news within weeks.

“We are creating a real gain for the consumer that also benefits our business. It’s a win-win.”

Eco-zealots will likely express outrage at the looming expansion after warning the initial scheme pushed people to take more flights than necessary.

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Jo Dardenne, from campaign group Transport & Environment, warned Wizz's scheme proved airlines were not serious about net zero, labelling the scheme an "all-you-can-eat buffet".

The service costs just £411, with members incurring a flat £9.99 per flight additional fee.

Members have access to seats up to three days before departure.

Defending the scheme, Váradi said: “This is just propaganda.

"People want to travel. The real question is how do they do that with the lowest impact on the environment."

He added: “You go to these COP meetings discussing carbon emissions and when you look around the airport you see hundreds of private jets.

"Whereas we just got recognised as having the lowest carbon footprint of any airline in Europe.”

Wizz Airline insists the best way to reduce its carbon footprint is to ensure that flights are as full as possible.

Váradi also stressed that members ranged from leisure travellers and business people to migrant workers.