Looks like Wed night and especially Thursday we will see some snow showers. On the latest weather, there was quite a large blob stretching from say Swindon to London. I know it's only computer graphics, but this has been shown consistently one way or the other since lunch time. I know it's frustrating, but once the cold air is in place tomorrow afternoon, radar watching will be the the thing to do.
Nina Ridge even said that it's still hard to pin down the exact extent of the shower activity Wed night and Thursday. So it could be less or it could be more extensive. Who knows?