One for Flecc and others with Raynauld's...
I put a gel handwarmer in each glove this morning, so that it was across the back of my hand, at the base of my fingers, and it made a big difference as although my fingers were still uncomfortably cold after about 30 minutes, they were a long way from being white. The next plan is to use mittens instead, so that I can put the handwarmers directly over my fingers, but it's proving to be difficult finding any mittens locally, so I may go for some Burton ones on eBay.
As an aside, a friend came over the other day on his motorbike. He's been riding for over an hour without gloves and when I shook his hand, it was hot - not warm, and certainly warmer than mine and I was warm and cosy indoors. So when some people say 'this glove is great' I'm afraid it means very little if your fingers get cold in anything below 20ºC.
I have tried hats, layers, thermals, etc but the only thing that works is a source of heat.