I finished The Diary of a Provincial Lady by E.M. Delafield within days; it really is almost impossible to put down.
The fictional heroine's droll diary entries are laugh-out-loud funny. It may be about a 1930s Devon housewife, but the stylistic similarities to Bridget Jones's Diary are unmistakable.
This edition, with a fabric cover designed by Cath Kidston, is part of the Virago Modern Classics 30th anniversary series. While reading the last few pages on the allotment, I noticed the cover matched the roses in one of the neighboring plots perfectly.