A shock celebrity dementia diagnosis usually sparks a rush of traffic to the NHS website to find out symptoms to look out for. Today is likely to be no different after the Birds of a Feather star Pauline Quirke’s husband announced her diagnosis and said she was stepping away from acting. The 65-year-old star was best known for her role in the hit sitcom Birds Of A Feather, playing Sharon Theodopolopodous opposite Linda Robson , who played her sister Tracey. Steve Sheen, who has been married to