In reply to tbhDuppy:
My arthritic fingers suffer in the cold even in summer so to prevent sore joints I tend to wear gloves on the hill if it is chilly.
I used to use Marmot XT gloves:
http://www.climbers-shop.com/10893061/products/marmot-xt-glove.aspx but I find them too sweaty and not warm enough for walking use (ace for ice climbing mind) so I decided to revert to childhood and get some convertible mittens.
I ended up with a pair of these:
http://www.climbers-shop.com/10907358/products/mountain-equipment-g2-alpine... which have been spot on. I can fit a liner glove under if it's really cold and it is easy to regulate temperature by folding back the mitt rather than taking them off.