If im 100% honest its really really borderline - if your south of London then you need elevation
if your north of london you need elevation but may still see snow -
places like High Wycombe - Luton / Dunstable look set here...
Cheers nick & blue
At least were in with a shout - ECM day 10 for london has lots of surface cold in slack air & a trough going south so as a minimum we would have been cold for 12 days--- 20/21st Dec !