Riding my bike has been a big issue in the colder months. I have a road bike so get up to a decent speed (I have done over 60kph on a steep descent). So for the hands it's like being in a gale on a cold day, only you can't put them in your pockets. Worse still they are totally exposed and your fingers are spread out half the time (hovering over the brakes and gears). And you can't really go that thick glove wise as you need to use your fingers.
I learned that most of the heat in your gloves is lost via the wrists and I also remembered that in some of my most desperate times (not cycling) when 3 pairs of gloves wasn't enough, pulling my sleeves over my hands always seemed to work.
So now I wear Gauntlets! Some of you may have been on to this idea for years but it's been a great relief for me. They are gloves that go half way up your forearm and the brand I bought were Seakskinz. Not actually made of Seals, just the brand name. They are tight, windproof and fairly thin and flexible.
50 pairs of cycling gloves later, I found my solution.