The catalyst for this routine roll-call of “House Of Fun” and similar early-’80s vaudevillian pop is the West End musical of the title where, like Abba and Queen before them, the Madness songbook has been Lloyd Webbered. At least the new tailor-written “Sarah’s Song” and “Simple Equation” sound like vintage Suggs and co (circa 1982’s The Rise & Fall), though how “Night Boat To Cairo” is worked into the show’s plot is anyone’s guess.