A British Airways flight carrying holidaymakers to Greece was forced to turn back when a "nasty smell" filled the cabin.
Passengers complained of smelling a foul odour, reportedly compared to the smell of cannabis by some, on the flight to Heraklion airport after takeoff from Gatwick on Thursday morning.
The plane crew was trying to get rid of the smell with air con, but it got things even worse.
The pilot turned back as a precaution. The flight was diverted over Paris and met by fire crews when it landed at Gatwick 90 minutes later.
Stuart Barnes, one of the passengers, told reporters: "We were four rows from the back and the whole area stank. Everyone was saying it was cannabis.”
Passengers were eventually put on a rescheduled flight at midday. The incident also delayed British tourists waiting in Heraklion for the return flight by up to six hours.
A BA spokeswoman said no evidence of cannabis or anybody smoking cannabis was found on board. She added: "Our pilot returned the aircraft to Gatwick as a precaution following reports of an unidentified strong smell in the cabin. We are sorry for the delay to our customers' journeys."