I use Jessops VC for most of my test/work prints.
Regarding developers, for Tri-x I've used divided D23, ID11 1+1 and Rodinal. I liked Rodinal best before I started to use Pyrocat HD.
I have only recently discovered Fomapan 400, and develop it in Pyrocat HD. For my taste this is a superb combination for what I use it for - grainy atmospheric heavily printed landscapes. Fomapan 400 has what is best described as "character".
I must stress that these are only my subjective opinions, based on my own personal taste, and what I am trying to achieve.
Alan Clark