In order for the contestants to be allowed in the house, BB undergoes extensive "routine psychological checks" to make sure they'll be able to cope with the alien environment.

But one pushed Jon too far during the screening process, he revealed to the group this afternoon.

The female psychologist kept pausing after he had finished answering questions to see how he'd react to the silence, but he was having none of it.

"I was providing an answer to the question, then I'd finish and she'd just pause for about fifteen seconds," he recalled.

"After she'd done this half a dozen times I said 'Look, I know what you're doing. I may not know all the tricks of the trade but this is amateurish and it's almost disrespectful in a way.'"

Just yesterday he also confessed he'd had a go at the Big Brother press officers whilst he was having his photos taken for the show. "They were chatting away in the background and in the end I had to tell them to shut up," he said.

He's turned on the staff, is it now only a matter of time before he turns on the housemates?