well the UKMO, GFS and GEM all showing a great start to the 12z runs. GFS and UKMO both show the shortwave moving south eastwards monday cleanly. GEM develops it more and it stays further north, close to southern britain, very unlikely outcome though i think, better chance is from the possible snow moving south through tuesday. Very cold UKMO 144 chart as winds start to swing more to the North East. GFS different and then moves the high eastwards over us before moving to the east and doing its best to prevent the Atlantic. The atlantic doesn't even make it in during low-res though and the trough disrupts, but don't think the chart will look like that come then anyway. It could be a long cold spell, heres hoping.