After really enjoying Sister, the psychological thriller by Rosamund Lupton, I've been thinking I'd really like to read more in this genre. I spotted The Poison Tree by Erin Kelly on YouTube and it sounds great so it's definitely one that has been added to my wish list.
Here is the trailer:
And here is a clip I found of Erin Kelly talking about the book, it's another one that is set in the UK and I'm really looking forward to reading it.