Airlines have been warned not to book holidaymakers onto flights that may be cancelled after a slew of offers for cheap deals to Spain, Greece and Portugal were released in a bid to boost bookings.

Airlines are increasingly warning of looming flight cancellations over the peak summer holiday months due to rocketing jet fuel costs caused by conflict in the Middle East, the Civil Aviation Authority (CAA) has said.

Anna Bowles, head of consumer protection at the aviation regulator, wrote to airlines to urge them to be “mindful of not offering flights for sale where there is a reasonable expectation that those flights will not operate” in the coming months.

Shorts

The UK is the largest consumer of jet fuel in Europe with analysts warning it has no strategic reserves and the Gulf crisis has exposed how vulnerable the sector is to supply problems.