Mapp and Lucia by E.F.Benson. My mother was ecstatic when this long lost favourite was reprinted in the 60's. She had it by her bed when she died. She still had an old copy of Miss Mapp from the 1940's which I was enchanted to see in one of Agatha Christie's bookcases at Greenway. Hours and hours of sheer pleasure. I could sit (and sail through!) an examination on this wonderful series.
For those of you who love the Mapp and Lucia books and series, this pink house in Rye, East Sussex will be the location of the Christmas special. I was talking to the lovely chap who owns the house so look out for it