Thousands of British holidaymakers face delays after the Government suspended flights from the Egyptian resort of Sharm el-Sheikh amid security fears.
Downing Street has said the plane that crashed in Egypt at the weekend “may well have been brought down by an explosive device” and has suspended all flights.
All 224 people on board on the Russian Airbus 321 were killed in Saturday’s disaster.
David Cameron’s office said British aviation experts were travelling to the resort to assess the standard of security before British flights will be allowed to leave.
No British flights were due to fly there on Wednesday.
Downing Street said: “We have become concerned that the plane may well have been brought down by an explosive device.”
The Irish Aviation Authority has also directed Irish airlines not to fly to or from the area until further notice.
Transport Secretary Patrick McLoughlin said the flight freeze would allow the British investigators to ensure “the right security measures are in place”.
“We can not categorically say why the Russia jet crashed but we have become concerned that the plane may well have been brought down as a result of an explosive device,” he said.
EasyJet has delayed flights to Gatwick and Luton this evening. “We are doing all possible to keep passengers informed,” a spokesman added.
Thomson has also suspended flights, one from Manchester.
Manchester Airport which was due to land at 2330.
The company apologised for any inconvenience caused to customers and said they would be in touch as more information became available.
The Government has sent extra consular staff to the airport and is advising anyone due to fly to the resort to check with their airline or tour operator.
It is estimated there are around 2,000 British holidaymakers in the resort.