Normally I plan my Edinburgh Fringe gig-going with tedious military precision, but one late night last August I was at a bit of a loss and wandered into The Tron pub to check out a comedian I didn't know much about. Liam Williams, who is also in the highly-regarded-by-Tim-Key sketch group Sheeps, was doing his solo show and it was one of those lucky finds, an enticing mix of northern flights of fancy and gritty Leeds-based autobiography.