A group of patients at the Priory clinic were surprised to a couple getting hot and heavy on a bench in the gardens - and even more surprised to see it was Kate Moss and Pete Doherty.

Kate has visited Pete a few times during the month he has spent at the clinic but usually more low-key that this weekend’s performance.

An inside source told the Sun: “It happened between half six and seven o’clock on Sunday evening.”

“There were a group of people attending a self-help group for the day. Because it was pleasant weather, their leader suggested they move things outside.”

“But during their session they noticed a couple getting rather fruity on a nearby bench. They were kissing and groping each other. Hands were going up clothing and there was lots of groaning.”

“They were practically having full-blown sex.”

“Then people realised it was Moss and Doherty - her skinny blue jeans were the giveaway. But a second later the couple noticed they were being watched and pulled away.”