You have rather mild temps in UK. I would avoid gloves that have a windproof outer layer with an inner layer that is cloth (including wool). The problem is that your hands sweat, stick to the material and when you remove the glove, the inside layer comes out with your hand. It's difficult to get the fingers back into the glove.

I have a pair of long fingered think leather gloves that I use for winter. They are OK to around 40F but not lower than that. I don't ride as much in the winter, so I've just mostly suffered with cold fingers. I don't need thick, bulky gloves and worry about inability to use STI controls with bulky gloves. I think I agree with the poster who has 8 pairs of gloves for various riding conditions. It's pretty easy to stuff a pair of gloves in jersey and switch during the ride.