I read about this novel on the Furrowed Middlebrow blog – it sounded like something I would enjoy, so I promptly bought a kindle edition.
Here’s the blurb
On the morning of her 40th birthday, Alison Penny believes that from now on her life should be nothing but serene and pleasant. That was before Miss Penny met Miss Plum. Victoria Plum was weeping on a park bench and obviously bent on drowning herself in the duck pond…
This was very enjoyable, reminded me a bit of the Lucia novels by E F Benson.