My thoughts exactly, how on earth does a huge metropolis such as London with a supposed UHI that increases the air temperature by 2-4degC manage to get hours of heavy snow from a weather system that came from the west when last week in my part of northern England, SE Holderness, we had a band of heavy ppn coming down from the Nth with no UHI in sight and temps of 1degC and yet all we got was hours of heavy rain...!!! really gets my goat, it goes against the laws of physics, like Manchester too, i lived there for 11yrs and it snowed heavily twice due to the UHI effect yet these days even they're getting regular snowfalls, it really is just a kick in the teeth, two years without snow falling in my area and the wait goes on...the models don't look promising either as the UK seems to be always in the mild wedge, i though the Jet was meant to plunge south in Feb...!!!