For control boards, I use a Duet 2 wifi on my Primo. Those should be readily available in the UK. V1 doesnt have configurations for those, but I have one that works with the latest firmware and am willing to share.
The BTT boards that Ryan sells ought to be available, if you look around.
The TMC2209 drivers should also be reasonably available.
Of course a Jackpot board would be nice, given that it is literally made for this application. On the Jackpot CNC Control Board official release thread, Ryan has direct order information, and there was a thread for European group buy of jackpot boards. Honestly I believe these are a great choice.