40 miles in the rain today, and by the end of it my fingers were so painful I could not fully pull the brake levers, and had to ask someone else to undo my helmet strap as my fingers were too numb to do it.
Silk liners inside SealSkinz waterproof gloves.
However- the ends of the fingers are all "tight" against my fingers, so I am going to try much looser gloves to see if keeping better circulation might be a help here.
This has worked well with my shoes- I was doing them up too tightly I think.
Winter gloves in general should not be tight. Feels great in the shop, but out in the cold they insulate far less than a pair with a little air at the tips.