What British actress born in May started in a television series set in a fictional Sussex coastal town? 
Mapp and Lucia (1985 TV series): Mapp and Lucia is a British television series, set in the fictional Sussex coastal town of Tilling-on-Sea and based on three 1930s novels by E. F. Benson. Mapp and Lucia (1985 TV series):  It was produced by London Weekend Television, filmed in Rye (on which Benson based Tilling) and neighbouring Winchelsea in the 1980s, and starred Prunella Scales as Mapp, Geraldine McEwan as Lucia, Nigel Hawthorne as Georgie, and Denis Lill as Major Benjy. Geraldine McEwan: Geraldine McEwan (born Geraldine McKeown; 9 May 1932 – 30 January 2015) was an English actress who had a long career in theatre, television and film.
Geraldine McEwan