A7's generous dimensions provide room for a 6-inch dedicated bass driver and allow it to deliver impressively full and controlled bass, even in large living rooms.

ENGADGET: Bowers & Wilkins intros classy A7 and A5 AirPlay speakers, leaves out the 30-pin dock

Her scenes as a cabaret singer ended up on the cutting room floor but many years later, the film was re-released on DVD with Driver's scenes restored.

BBC: Coronation Street actress Betty Driver dies, aged 91