Thanks to all who answered.
From what has been said above I will try Sandy's Pyrocat-HD as advised by many and give this shot. I trolled through Unblinkingeye with heavy blinking eyes late last night and it seems this developer will do what I want. I also ran through the Forum on Michael and Paulas site which also gave me a lot if info.
A problem that I might have is that my BTZS tubes are home made and the 'reservior' for developer only holds 65ml. Is this going to be enough for a 5x4 neg?
Any advice on where to buy in the UK will be greatly appreciated as well