I've held off a little on this, though I've mentioned the possibility on the 'weather warning for gardeners thread'.
this week shows an astonishingly rapid turn around in weather, particularly for those in Scotland who have been having record warmth. Snow looks quite likely to be coming to the northern half of the uk, more so I think down the Eastern side. It looks likely to start Monday night, progressing further south into the Pennine region into Tuesday, where some significant accumulation could occur. Of course hilly areas are more susceptible, but it is rather possible there will be snow cover down to low levels.
Further south, sleet or cold rain is more likely.
GFS shows highs of 0C in northern Scotland on tuesday!!!
Updates in the run up :)