Gatwick Airport flights grounded by runway spillage
Flights from Gatwick Airport were grounded and more than 20 inbound aircraft were diverted because of an oil spill on the runway.
A spokeswoman for the West Sussex airport said the runway was shut while crews cleaned up the spillage which happened at about 10:15 GMT on Monday.
Flights recommenced before midday but passengers were warned to expect delays because of the "knock-on effect".
It has not been confirmed what caused the spillage.
A total of 23 flights were diverted before the runway reopened at about 11:40 GMT.
Other aircraft circled the skies around the airport while the clean-up operation was carried out, according to flight tracking data.
In a tweet, the airport said: "Our runway has now re-opened and flights are arriving and departing.
"Flights have now recommenced, however some flights have been diverted. We recommend that you contact your airline for the latest info."
Gatwick is the second largest airport by passenger traffic in the UK.