Uk legal fiction?

So I love my legal thrillers: Michael Connelly with Lincoln lawyer, John Grisham etc as well as tv dramas – all of which means I know a fantastic amount about procedure in USA, BUT hardly anything about my own country: UK.

I’ve read non-fiction by secret barrister, Alexandra Wilson in Black and White which give great accounts of uk legal systems, but wanted to know if there any great fiction books that are legal and court thrillers based on uk courts??