Sir Ed Davey insists his party is not downplaying important issues by taking a light hearted approach. In recent months the leader of the Liberal Democrats has been seen bungee jumping, zumba dancing and hobbyhorsing while campaigning. With local elections two weeks away, Sky News is filming a series of interviews with all parties on the campaign trail - and we've invited all five of them to take part. This week our political correspondent Rob Powell has joined Mr Davey as he targeted voters in