SOLVED. Children to tween novel: read in early 2010's - about lottery winning and going to Weston-Super-Mare with a castle, loses a friend I think.

[Tahnee]

I know it had a bright pink cover, about a young girl who's mum finds out she won the lottery, they go to Weston-Super-Mare on holiday, and end up living in a large and dim castle type place. Please help, Ive been wanting to read the book again after so long, I surprisingly really enjoyed it!

[Tahnee]

I actually found it: it's Diary of A Lottery Winner's Daughter

[SamSpayedPI]

Diary of a Lottery Winner's Daughter for the link.