Seems to be an interesting tweak to the setup developing in the models - HP builds north with cold air flooding south, a lobe of the HP splits and sinks south allowing a brief milder interlude for some before a renewed cold push moves south again. So in some ways and assuming it verifies, it's kind of a halfway house between the ECM ops collapse pattern of the other day/s and the clean HP solution.
In general though the Ops all look consistent/good this morning if it's cold you're after. GFS ens IMBY suggest a decent chance of cold but there's still a bit of mild scatter suggesting where the cold/mild boundary sets up is unsure and may be further north. Any LPs encroaching though should up the moisture content, which is not a bad thing for more general snowfall as opposed to showers for those on windward facing coasts.
IMO it's the kind of setup that could lead to significant snow for some on the boundary and with the deep cold air hitting the North, showers would seem fairly likely for some, maybe longer spells of snow if any disturbances develop in the flow.
All a bit far out to be looking for specifics though in terms of the general pattern verified how snowy or otherwise it'd be! As Michael says though the building blocks are mostly assembled in the reliable part of the runs now, so (my) confidence in the broad pattern (and cold for the North I'd say) is pretty high, just the specifics and how the messier interaction down South pans out TBC but looking good as it stands.
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