Passengers at some of the country's busiest airports are facing disruption due to fog.
Much of the UK has been shrouded in mist in recent days and the weather is having an impact as airports return to their normal schedules after Christmas.
Travellers are being urged to check with their airline as air traffic restrictions are in place at several UK airports due to fog, the country's main air traffic control provider Nats said.
Gatwick and Manchester, the UK's second and third busiest airports, were among those affected by the weather.