Perhaps, but I wouldn't be quite so pessimistic Andy. Some of the senior and more respected forecasters in the model threads are saying the general trend is indicating Snow north of M4 and Greater london. They all seem in agreement, as do the MetO, that the snowline will be 30 miles or so south of where the models are showing. I am not surprised, the temperature predictions for Northampton are a max of 1c, most of the day it is freezing or below. I know there is a lot more too it with 850hpa temps and dew points, but ground temps close to freezing do help. I'd say this is certainly less marginal than I am used to, the past few times it's snowed it's been 2 or 3c with -5 or -6 850 temps instead of the preferable -8. Ultra marginal wet affairs so this is actually nicely not too marginal for once.
I wonder if one day midlanders will get a nice event where the 2 meter temps are -5c at 0m ASL, the 850 temps are -12c, and there is a bucket load of precipitation. Lots of snow, and zero marginality. One day I hope.