All to do with being a small land mass, gulfstream and the Coriolis effect
If we loose the gulfstream you'll soon find out what proper snow is like

Most likely at best we'll have weather very simliar to Canada and Europe at out Latitude. Worst case is it could push the Northern Hemisphere into the next ice age
We are never going to have steady weather until one of those things change.
Also have to remember that we are at the tail end of an ice age
I love the oddities of British weather, screw having 50 degrees in the summer and 12 foot of snow in the winter