Some departures out of Manchester Airport are experiencing modest delays as planes wait to refuel following production problems at a refinery in Merseyside.
No cancellations or diversions have been reported as the airport battles to return to normal service.
Problems were caused overnight following a cut in supplies from the Essar refinery.
Tanks are, however, now being refilled, with 13 departures so far affected.
Many airlines put contingency plans into action, drawing fuel from other European airports before departure for Manchester.
Manchester airport uses about three million litres of aviation fuel a day.