8th - 12th is either going to be cold or very springlike.

UKMO has the cold pooling just to the South

South staying cold

GFS T162

Again, highlighting the possible outcomes - as per ENS. ECM is again the most consistent and so will await with interest.

GFS back to normal sadly, but just a question of whether the high can hold position, sink or move nw

The 06z op was an outlier though (in the sense of being the most extreme in terms of temperature, rather than the overall pattern) and I am not surprised to see the 12z op revert back to the above. GEFS obviously does show support for a UK High to extend into Scandi but we have to wait and see I guess. ECM is leading the way and for now, I am having more faith in that model.

in the shorter term UKMO looks to have a decent easterly for the SE for a few days and perhaps some wintry potential

Also, just to reiterate what has been said, a UK High won't mean it will be mild. Bigger diurnal ranges and with much fog/frost overnight with wide local variations  too. In other words, stable winter conditions. Many valleys could actually be much colder than now. Where the sun does pop through, then naturally day temperatures will edge back to normal.

The drier Continental air lingers in the south. I'd expect the short GEFS to paint a cold picture down here at the surface a week out, even if not aloft. That would fit in well with the EPS plumes from earlier today as well.

Very good point , in a few areas fog could linger all day giving sub zero days

http://modeles.meteociel.fr/modeles/gem/runs/2015020112/gem-0-90.png?12

Reasonable easterly into the SE from GEM

Taken together with the much improved UKMO for SE snow prospects, this is pleasant again.

edit just seen the GME which - to be fair from my perspective - has performed well as it retained the high centre sufficiently NW thus allowing the cold NE feed later this week whereas other like UKMO were producing flabby and ill positioned HPs.

and the NAVGEM is cold:

GFS perhaps trying to retrogress our block towards Greenland. Some energy going under at last

Lump of a HP setting up across the UK

should be a lot of frost and not too cloudy with the continental feed anyway

from here a lot of things could happen...even a proper beast later in response to the WAA up the western flank of the high

The cold days continue for quite some time as per the latest Met O update

Greece colder than greenland.

http://modeles.meteociel.fr/modeles/gfs/runs/2015020112/gfsnh-1-234.png?12

That cold air to the east looks like it may be dragged around the south of the high. Nope heading towards the balkans and Greece.

The GFS and GEM, NAVGEM and the UKMO, appear very cold with low daytime maximums Thursday and Friday for Southern and SE UK parts, cold with 1025 hPa line there, lower by 5 Mbps on English Channel where more greater risk of sleet and heavy snow showers, than for South and SE UK which still could be very cold with moderate frosts night and evening and mornings, with strong very cold Scandinavian Germany Denmark Netherlands to Denmark through N France and S SE UK, inland risk is for some sleet and snow showers especially above 150 metres ahem.

It turns dry by Saturday but as the Mid E N Atlantic To UK High dominates on all those models at t144hrs it looks still cold especially in the Far South and SE side in UK.

Not really  http://www.meteociel.fr/modeles/gfse_cartes.php?&ech=234&mode=9&carte=1

The theme for generally anticyclonic week ahead continues on the 12z output. A few people are making the mistake of thinking mild upper air (oranges on the t850hPa charts) means mild at the surface. As Mike has mentioned it could be indicative of a temperature inversion which could lead to some very chilly nights.

http://wxmaps.org/pix/temp4.html

This is what the Indian model thought would happen to the high on its 0z run:

by day 10 there's a slack easterly and -10 uppers