Question: who played cassandra's mum in only fools
Answer: Wanda Ventham ( born 5 August 1935 ) is an English actress , known primarily for her role as Colonel Virginia Lake in the 1970s science - fiction television series UFO , and for her recurring role as Cassandra Trotter 's mother Pamela Parry in the sitcom Only Fools and Horses from 1989 -- 92 .