File photo dated 23/3/07 of Frank Thornton, and Wendy Richard , as Are You Being Served? actor Frank Thornton died in his sleep in the early hours of Saturday morning at the age of 92, his agent David Daly has said. PRESS ASSOCIATION Photo. Issue date: Monday March 18, 2013. See PA story DEATH Thornton. Photo credit should read: Fiona Hanson/PA Wire