An air traffic control problem’s grounded flights across the UK including Heathrow

The provider’s limiting the number of aircraft which can fly in the “London control area.”

Gatwick, Edinburgh, Manchester and Birmingham have all suspended departures.

Nothing’s leaving Heathrow either – the country’s biggest airport.

Former pilot and aviation analyst Alastair Rosenschein says those in the sky are the priority:

The system’s been restored, though disruption’s likely to last a while.