More than 100 flights were cancelled, including more than 60 easyJet services, with the disruption carrying over into Monday (9 September).
The UK’s ATC provider Nats put the issues down to "short-notice staff absence" as well as European ATC restrictions owing to adverse weather.
Nats said its decision to impose temporary air traffic restrictions was made on safety grounds and to minimise disruption, The Independent reports.
Ryanair, which operates from around 20 UK airports including Gatwick, has renewed its calls for Nats chief executive Martin Rolfe to resign – or for new transport secretary Louise Haigh to remove him from his post.
