British television has hosted some celebrated double acts over the years - from the Two Ronnies to Reeves and Mortimer, from French and Saunders to Fry and Laurie and from Mitchell and Webb to Matt Lucas and David Walliams. But none of these acclaimed duos come within a million miles of challenging the cherished place in the folk memory of television's golden age occupied by Eric Morecambe and Ernie Wise, whose partnership lasted from 1941 to Morecambe'...