Edit: From http://www.bbc.co.uk/weather/ukweather/warnings.shtml: "Thursday 8 February WEATHER WARNING East Anglia, Lincs, the Midlands, central and north Wales will continue to experience heavy snow. 5cm of lying snow is widely expected, and possibly as much as 15cm. Travelling conditions will continue to be dangerous. Valid until 1500GMT"
Yes, I am somewhat bemused that 5cm (2 in.) of snow is a big deal, but it is England. I've seen what an inch of snow does to London.