The head of the UK’s air traffic control system doesn’t believe yesterday’s disruption to flights was caused by a cyber attack.

Martin Rolfe, the boss of NATS, will speak to the transport secretary to explain what led to more than 1-thousand services being cancelled.

These people were diverted from Heathrow to Cardiff – and have had to return to the west London hub.

With 190 flights cancelled today British airways and crews and planes out of place, British Airways is offering free flight changes to tomorrow online.