Oxford PlayhouseAn empowered Belle leads an energetic cast in this song-packed extravaganza, featuring nifty shadow play, terrifying puppets and infectious 80s classics With the general election looming, writer-director Steve Marmion promised to "go lightly on the politics" in his new pantomime. A wise decision, given the fractious national mood. Instead, Marmion's fifth panto in a row at the Oxford Playhouse turned …