My faves are:
A Chelsea Concerto by Frances Faviell - The author lived in Chelsea during the Blitz, and this a sort of memoir, and it’s excellent.
Faviell also wrote The Dancing Bear, set in Berlin during the four years after the end of WW2, and this one is even better, I think. The protagonist is the wife of a British officer stationed in Berlin, and the story of a German family she meets. The story is a real cracker! It’s very similar in style as Shute’s Pied Piper.
Crooked Hearts by Lissa Evans and The New Mrs Clifton by Elizabeth Buchanan are ones I really liked too.
Henriettas war: news from the home front 1939 -1942 -this one is very witty and charming.