Here you go:

GFS is sneakily bringing in an easterly flow of sorts for Xmas Day. Not particularly cold, though, and more of a southeasterly.

Then early in January something you don't often see, even in La-la-land - virtually the whole country above 1050mb!

Yes. There is definitely more interest so far this evening.

Looks like a slow burner this one lots of dry faux cold boring weather to get through before the promised land. We hope

many epic cold spells of the past endured a boring “faux” starting period 

a little more interest tonight, perhaps the late December cold spell hope isn’t entirely as dead as some posters believe 

Tonight's T+240 ECM isn't too far from giving us what we (or most of us, anyway) want.

IIRC we had a spell of such weather before both the mid-Dec '09 to mid-Jan '10 and late November/December 2010 severe spells.

It isn't normally the case, in my experience anyway, for us to go straight from an unsettled westerly period to a major cold outbreak without a HP-dominated spell in between them. We also had a spell like this before the February 1991 freeze too as far as I recall.

We did indeed - nearly a week of quite benign quiet days as the high extended from the Azores across the UK and up to Scandinavia. The arrival of the deep cold was courtesy of my favourite feature - a cold front moving east to west dropping temperatures by 7 or 8 deg in 12 hours as the snow flurries moved in on the Tues afternoon.

Back to reality - the chaotic nature of the NWP in the latter stages continues as the grids try to resolve major changes higher up.

Earlier than that, the Xmas period is still evolving as well. A day or so ago it looked like a weak NW'ly PM flow, now the models are looking at HP taking more of a role over the UK (and then all that might follow after that in the NWP).

Shannon Entropy anyone?

Nearly got 4 corners now.

5C on January 1st and no frosts aren't particularly inspiring me especially after a December that will probably have zero frosts here this year. It is going to be a mild start to winter.

ECM says have yourself a plume-tastic little Christmas:

Maxima widely 10-12 c - BBQ for the Turkey anyone?

https://weather.us/model-charts/euro/great-britain/max-temperature-6h/20181226-0000z.html

Still remember that day well, though it was snowing here in the morning as we went to school

It’s just as plausible the much fabled wind reversal doesn’t propagate favourably for our neck of the woods at all.

January bar 10 & 13 (or was it 14) has produced little if nothing notable in my region over the past 20 or so years.

The GEFS from the 12z indicate fairly mild out til Christmas Eve, then it can get cooler or milder.  Depends where the controlling high sits, the much vaunted ECM went for the milder version on its 12z Op.  More runs needed before this one is resolved. The lack of snow rows is notable.

Not bad at all from UKMO for Christmas day a light southerly and dry for many

I’m rather partial to a spot of dry faux cold, good walking weather over the Christmas break, walking to pubs through Epping Forest and chilly enough to appreciate their roaring fires. 

Looks roughly 40% 2-4C 40% 5-7C and 20% 8+C from boxing day onwards. I see that as a high chance of it being either cold or very cold with a small chance of average.

I can still sense something is brewing.

The Japanese are showing a beast from the east after christmas, I know sometimes the JAM +168h is jammed...but in other hand sometimes it delivers something

. The possible SSW is on the wrong side of the globe if we se the VP in Iceland or Greenland it could be good news, otherwise it could be for China and Russia...

Absolute shocker of a pub run through T+252.

A truly, truly awful run.

I won't be able to find a bin large enough for that monstrosity.