This is an artful wheeze. Take the story from the sunniest of films, a 1957 cheer-up British Lion starring Peter Sellers, Margaret Rutherford and Bernard Miles. Bolt on some classic Irving Berlin songs, and you’ve jukeboxed a stage musical. Director-writer Thom Sutherland has done this – fresh from a London success with Grand Hotel – for a cheerful touring show with a six-piece band. I saw it at the Mercury, which produces it, before it squares its shoulders and toots off round the country. A thin Monday house was hard to stir, but the frolicking energy of the cast and the sheer good-humoured Ealingness of the story got us going. Hard not to, with so much help from the Berlin tunes and lyrics.