I’m looking for a book I read a few years ago. It featured a family with a single mother and three or so children who run away due to financial issues I think. The eldest of the children takes them to a hollow tree in the park and they scab off leftovers from a cafe nearby. At the end of the book she receives a new sketch pad from her mother when they return home. I cannot remember the name and that’s about everything else I can remember.
I think I’ve found this. ‘Lily Alone’ by Jacqueline Wilson.
Pulling quotes about the book from various sources:
Lily, Bliss, Baxter and Pixie run away to the park and camp out in a hollow tree which Bliss found.
Also, both from Wikipedia:
They feed themselves by stealing leftover food from a nearby cafe.
The story ends, sadly, with Lily drawing a picture of the Green family and writing at the bottom: "We're all going to be together very, very soon."