Replcement of a Bramham shower mixing valve?

Look here:

https://www.showerdoc.com/sirrus-bramham-shower-spares

Specifically:

https://www.showerdoc.com/sirrus-bramham-shower-spares/question/dripping-shower-56747

and

https://www.showerdoc.com/sirrus-bramham-shower-spares/question/shower-still-drips-after-use-102997

There may be other relevant threads but you should be able to go through them for yourself.

Showerdoc may be able to advise on a suitable alternative if yu really want to go that way

sggs
October 2017