“I should have married Kate!” a disgruntled horse and a peeved Swiss ski instructor proclaim.

Barbershopera pull no punches and jump straight into their latest biting cabaret offering opening with their own special take on the recent Royal wedding. Three guys and a girl form a comedy barbershop quartet, giving the genre a whole new meaning - rapping, reggaeing and rocking their way through every day gripes and topical political sarcasm.

Led by writer/performer Rob Castell, the group conquered the Edinburgh Festival Fringe several years running gathering a hoard of awards, have toured to South Korea and adapted their first show to a BBC4 radio play. The lyrics are mostly clever, fresh and witty and even though some pieces are now slightly outdated, they are so well executed that they are a pleasure to watch nonetheless. Whether belting out Livingstone for Mayor (to the tune of Living on a Prayer) or huddling uncomfortably in a make-believe tube carriage confessing their London Underground anxieties, this group of four distinct individuals gel wonderfully with each, getting the chance to solo-shine as appropriate.

Rob Castell works best as the rather dodgy nerd who stalks his co-worker in “The Girl I Work With” while lanky Pete Sorel-Cameron steals the show singing of romance between STD carriers at medical drop in centres.

Bootylicious Lara Stubbs gives most Hollywood starlets a run for their money in the looks department and keeps it feisty and real. Ruggedly handsome Will Kenning gets our hearts-a-thumping with impeccable deadpan comic timing and some solid bass-baritone lamenting about his man-boob predicament.

This well-paced show is unfortunately slightly let down by its finale - an audience sing-a-long to some rather testing lyrics. Although a well-intentioned exercise, this is best left at the fringe scene. Equally, the in-between-song banter requires slight refinement but all in all, Barbershopera is a deservedly regular act on the comedy scene.