I headed out on Saturday morning for a ride with a friend (HH). I called HH when I got on the train to find out that he couldn't make it. I got off the train early at WGC and headed east towards Hertford/Ware then turned north. In London it was cold - just above freezing - and overcast. When I got off the train in WGC it was 50 yards visibility foggy and a few degrees colder - puddles were frozen and there were patches of ice.