Nick Clegg has helped ice a cake at Bettys in Harrogate to mark 100 days before the Tour de France's Grand Depart begins in Yorkshire. The Deputy Prime Minister also explained why he felt the need for a debate with Ukip leader Nigel Farage. Report by Barnesj. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn