Tour de France: Gary Imlach on the Mark Cavendish era

Gary Imlach describes the effect of Mark Cavendish's success at the Tour de France on ITV4's coverage of the race.

The HTC-Columbia man has won 15 stages in the past three Tours de France, a staggering statistic which has boosted the popularity of cycling in the UK - and boosted the number of British fans travelling to France to see the race.