By Lucia Hodgson Lib Dem leader Ed Davey’s madcap antics are attention-grabbing but not necessarily the best way of getting a message across, says Lucia Hodgson On day six of the general election campaign, I started to wonder if the Liberal Democrats had any non-water themed stunts up their sleeve. We have already been treated to leader Sir Ed Davey in his first wetsuit as he toppled into Lake Windermere from a paddleboard. Next, and again sporting a second wetsuit, Davey plunged down a slip n slide, howling with laughter like a man without a care in the world – or indeed an election to win. H…