Keep the extremities warm and as dry as possible, so good quality gloves, overshoes or winter boots, and a skull cap for the head and ears under your normal headgear are all essential, as is a good quality winter jacket. Quality tyres, such as Conti GP 4-Seasons will minimise the risk of punctures (the last thing you need on a frosty or wet morning). Studded tyres are a bit of overkill in most areas of Britain - though they can make cycling fun in snow and ice.
Stick to main roads when it's frosty, since they should be salted. Beware of days when it's extremely windy - sometimes it's safer not to cycle. Good reflectives are just as important as good lights, particularly on the lower leg, feet or pedals which will help identify you as a cyclist to drivers when the weather's bad. For cycling in the dark, two sets of lights, front and back should ensure you don't get caught out by a flat battery. Enjoy.
Stick to main roads when it's frosty, since they should be salted. Beware of days when it's extremely windy - sometimes it's safer not to cycle. Good reflectives are just as important as good lights, particularly on the lower leg, feet or pedals which will help identify you as a cyclist to drivers when the weather's bad. For cycling in the dark, two sets of lights, front and back should ensure you don't get caught out by a flat battery. Enjoy.