Review at a glance O n paper, SpitLip Theatre’s delicious knockabout musical about a plot to fox Hitler shouldn’t work. Neither should the operation it was based on. But MI5’s crackpot misdirection scheme, in which fake invasion papers were planted on a washed-up corpse, helped change the course of the Second World War. Now an exuberant, energetic, incurably daft show about it is in the West End, after a five-year journey through fringe and regional theatres that has become part of the story. Last night, three of its four co-creators were in the cast of five: the other two had...