Chance of a white Xmas Eve: 30%!
Chance of a white Xmas day: 10%!.
A few sleet / snow flurries are possible in the far east Midlands. Other than this, no real risk.
Remember, a white Xmas is defined by 1 flake of snow falling anywhere in this region, so not everywhere will see the snow that defines a white Xmas if it occurs.