SOLVED. A book about a boy who goes to a private school focusing on arts but had a sort of club for kids with abilities. [s]

[Alys]

A boy goes to a private school that focuses on the arts.
One boy could see the past in objects
One girl was a drama student
The school had strict dining rules, if you didn't clear your plate before the next course you didn't get a serving
There was an exterminator with three cats
the boy came from a rich family
the school was possibly his father's school in the past, he was in the music section even though he didn't play.
The cover had the boy and the cats I think.
The Music Students wore Blue, Drama Purple, and art green. I think

[Rosa]

Midnight for Charlie Bone

[Alys]

That's it, thank you! :-)

[Rosa]

You're welcome!