The Lie Clocks

Jon Snow told this joke at the RTS Dinner held in his honour last week.

A man died and went to heaven. Standing at the pearly gates he saw a huge wall of clocks behind St Peter and asked him what they were.
"These are lie clocks," said St Peter. "Everyone has one. Every time you lie the hands on the clock move a little."
"Oh," said the man, "whose clock is that?"
"That's Mother Teresa's clock," said St Peter. "The hands have never moved because she never told a lie."
"Incredible," said the man. "So where's Tony Blair's clock?"
"Jesus has that one in his office," said St Peter, "He's using it as a ceiling fan."

Source: Broadcast