There is good agreement to 144hrs which is good, with the forecast and pattern agreed up to that point if you look at the ECMWF and UKMO Model.
There could be rain and snow in Scotland for Friday and Saturday. And Friday has heavy rain for S SE and ESE England on this coming Friday.
Chilly for much of the UK on Saturday to Monday (3 days with winds blowing in from the NW then North.
What the Models do for after T144 is up in the air at the moment. Wintry showers for Scotland on Saturday as well quite possible mixed with rain at lower levels.
Will the Eastern Mid North Atlantic High stay over the Western UK on Monday to Wednesday next week- GFS says No, but ECMWF says yes. Will this forecast upgrade or downgrade for cold weather fans. The 12z ECMWF and 12z UKMO has a blocked out Low Pressure for the Midwest North Atlantic to our WSW and South southwest with UK and NE Atlantic High Pressure hold firmly- to T144 at Monday next week- ECMWF has cold Northerly over UK even on Wednesday/ Thursday next week while today’s 12z GFS brings the Low P NE across the UK for same time period, then drags the cold Northerly as it passes SW to ENE.