My Summer of Love by Helen Cross

It's 1984 and one of the hottest summers Yorkshire's seen. It's the kind of woozy heat you lose your mind in. Mona is 15 years old. She's a drinker, a thief, and a fruit machine addict. Things are already going badly in the pub where she lives with her obese step-brother PorkChop, but when Mona meets posh Tamsin Fakenham, a sassy girl with beautiful breasts, an actress mother, and a sister who's died of starvation, things very quickly get much worse. Winner of the Betty Trask Award 2002, this novel was made into a 2005 film starring Emily Blunt and Nathalie Press.