Not a great deal more to add. Hard to tell how far fronts will have pushed across the country, or where the precise century of the anticyclone will be in 10 days, but:

**On 12th Dec, at T240, the UK will be experiencing a mild airflow, as Atlantic troughs struggle to make progress across the UK, du to a blocking high over Europe/the Baltic. The NW is likely to be windier and wetter than the SE, but frosts will be virtually absent from any part of the UK. The SE may be experiencing some unusually mild weather for the second week in December.**

Peachy, for December in the SE, perhaps; then just enough time for a zonal flow to be established for a week, morphing into a freezing Arctic plunge which will lead to the widespread snow showers that aren't going to happen towards the end of this week. *))

PS The last part of the last sentence needs to be taken alongside some of the contents of a gritter.