The offensive discharge was deposited shortly after take-off on the seven-hour flight from Heathrow to Dubai. Cabin crew tried valiantly to deal with the overpowering pong caused by the festering turd as the plane headed over Belgium. But their efforts to nullify the terror tom-tit were in vain, and just 30 minutes into the flight the captain told passengers he was heading back to Heathrow.

Abhishek Sachdev, a Hertfordshire-based borough councillor who was luckily seated some way from the toilet in question, told the Mail Online: “The pilot made an announcement requesting senior cabin crew, and we knew something was a bit odd. About 10 minutes later he said you may have noticed there’s a quite pungent smell coming from one of the toilets. He said it was liquid faecal excrement – those are the words he used.”

Passengers were then told that the plane would be returning to England for health and safety reasons. Their three-hour wait for another plane eventually turned into a 15-hour delay.

A British Airways spokesman told the Welwyn Hatfield Times: “We’re very sorry for the discomfort to our customers. We provided them with hotel accommodation and rescheduled the flight to depart the following day’s lunchtime on an alternative aircraft.”

It is understood that no one has come forward to claim responsibility for the evil evacuation. We bet the culprit stocked up on Imodium before reboarding though.