I recently bought the Orina 118 gloves. They got high reviews and although I've only used them twice on a couple 50 degree mornings, my hands were sweating they were so warm (I should say "sweaty" as my hands were dry when I took the gloves off). They also have long gauntlets that fit very nicely over my jacket sleeves. I'll have to wait for cooler rides for a better review, but so far they are warmer than anything else I've come across.
Don't know about the UK, but the US distributer is here:
http://www.adventuremotogear.com/gloves.mgi?mgiToken=6XNJN37TF1TG21U9
