One-off family comedy. Father and son Len and Joe Spud have very little, but they become overnight billionaires when Len invents a new toilet roll. Joe now has everything he ever wanted – except a friend.

Len starts dating Sapphire Diamond – a 40-something-year-old hand model who claims to be 21 – who is only with him for his money, and he neglects Joe. The butler helps Joe to transfer to the local comprehensive, where Joe is sure he will make some friends.

Joe meets Bob and they become good friends, but Joe hides the fact that he’s so wealthy. When Len turns up at the school with Joe’s forgotten homework, the cat is out of the bag.

Billionaire Boy is a children’s fiction book published on 28 October 2010 by HarperCollins and written by David Walliams and illustrated by Tony Ross. The story follows Joe Spud who is the richest boy in the country and has everything he could ever want, except a friend. The book was adapted for BBC television, broadcast on 1 January 2016