Passengers across Britain are suffering travel chaos after an air traffic control issue grounded planes at the start of the school summer holidays.

London’s airspace was closed for more than an hour because of “technical issues” said to be caused by a “radar failure”.

While the outage has now been fixed, hundreds of thousands of passengers are likely to be affected.

Air traffic control provider Nats said at 4.13pm that it had “restored the system” which is causing flight delays and is in the “process of resuming normal operations”.

Several flights scheduled to arrive at UK airports were forced to conduct holding patterns or divert elsewhere.