I'm based in Ashton-U-Lyne just under 200m above sea level but we have barely seen any snow for 10 years I think my daughter has been sledging once as we just have not had snow where we are due to the hills around Manchester for our shadow unless we get a irish sea streamer in a very specific direction or a very strong easterly/north easterly that makes it over the hills (2009/2010 style) we just dont get snow that even lies despite our height
in other words, if its cold enough to snow it wont snow, but its its warm enough to rain we will get rain rain and more rain. Someone explained its to do with the upward movement when the air is colder but i cannot remember the exact reason for this happening