Prunella Scales

Prunella Scales (born Prunella Margaret Rumney Illingworth; 22 June 1932) is an English actress. She is best known for her role as Basil Fawlty's wife Sybil in the BBC comedy "Fawlty Towers" and her BAFTA award-nominated role as Queen Elizabeth II in "A Question of Attribution" ("Screen One", BBC 1991) by Alan Bennett.
In March 2014, her husband Timothy West revealed to "The Guardian" that Scales was living with Alzheimer's disease.