My friend took part in Bargain Hunt a few years ago and the BBC were filming a "celebrity programme" at the same time. Julian Clary was one of the celebs and my friend said when they were filming the shopping part he was so stuck up and up himself and refused to sign autographs for people who recognised him.
When they filmed the Auction him and his Mother sat in the room set aside as the green room and didn't speak to or mingle with anyone, he filmed his bit of the Auction and then walked out with his nose in the air and hid away again.
You see, this isn't really very fair. It's common knowledge that Clary loathes 'celebrity' and doesn't do well mixing with others in groups.
So, he probably doesn't have his nose in the air; he's just not comfortable and groups and likes to keep himself to himself.