"We have to schedule people with times," says Siān. "That can be a bit difficult as you don't want to call them in too early but then we've got to stagger it. So we may start about an hour and a half before the show starts. It is challenging getting everyone ready in time. It's quite a big cast with a lot of wigs and specialised make-up and they're getting into make-up, wig and costume in a short space of time."
WNO perform La Cenerentola at Birmingham Hippodrome Theatre on November 15. It forms part of the autumn programme with War and Peace (November 17) and La traviata (Nov 14 and 16). For ticket information see www.birminghamhippodrome.com or call 0844 338 5000.