Just thought I'd post this in here - courtesy of snowwonder in the Winter Model Discussion thread, it's from Luton Airport, but still reckon it sums up the UK situation pretty well.
'UK - As forecast we have seen large accumulations of snow across far eastern parts of the UK over the last few days which mostly missed LTN & STN, but ice is now affecting many other areas of the country. The next 2 days look much drier and brighter but still very cold, giving us some respite from potentially disruptive wintry weather but a continued risk of severe frost and ice and plenty of de-icing activity. However, towards the end of the week it looks as though there will be a transition to more unsettled conditions spreading from the west. Over the last few days the UK has seen a battle between cold air to the east and north-east, and milder, moist air to the west. Cold air has certainly won the battle for the moment but milder air in the west is trying to push against it all the time. This is creating very difficult conditions to forecast. The current thoughts are that a band of rain will push in from the west on Friday, hit cold air and turn to snow that could produce significant accumulations for much of the UK. The main risk areas initially are Northern Ireland, Wales, northwest England, the West Midlands and southwest England but it is likely that these conditions will move east over the course of Friday and into the weekend. However, considerable uncertainty remains in exactly how the band of precipitation will then position itself, whether it continues northeast or stalls over western Britain. In the extreme west, snow is likely to turn back to rain but we could see large accumulations of snow in places. Amounts of snow are highly uncertain but there is currently a moderate risk of severe disruption to our operation. Over the weekend further outbreaks of rain, sleet and snow are expected to push in from the west but there is still considerable uncertainty as to how quickly this might happen and whether or not we will see slightly less cold conditions despite the above predictions.'