BBC News
Some 26 EasyJet flights in and out of Gatwick have been cancelled at short notice, with the airport blaming staff sickness.
A spokesperson said the London airport was facing staff shortages in its air traffic control tower.
It came as Gatwick reported its half-year results, which said it was "now very much operating business as usual".
Gatwick confirmed that 13 arrivals and 13 departures had been cancelled, out of a total of 180 EasyJet flights scheduled for Tuesday.
A spokesperson said: "At 07:00, restrictions were put on the number of flights that can arrive into Gatwick due to late-notice staff absence in the airport's control tower.