Gatwick Airport
Officers are trying to trace the culprit after more than 24 hours of disruption.
Customers complained of "chaos" while bosses blamed a technical hitch.
Handful of flights diverted, but operations now back to normal.
The average delay was 15 minutes.
When I was detained for five months, we were calling out for someone from outside to come and see how we were being treated
'We were 10 minutes away from boarding when our flight was cancelled out of the blue.'
BBC claims it witnessed staff 'mocking, abusing and assaulting' detainees.
Were you at Gatwick airport?
One third of flights were delayed by more than 30 minutes.
Fault hit people heading away for the Bank Holiday weekend.