I was up on the downs in Eastbourne twice today. In the morning,about 9.00am it was snowing quite a bit and very cold. At about 3.00pm it was feeling positively warm in comparison and the snow was melting!
Agree with JamesC ; very difficult to predict even 12 hours away and snow is often very localised. I live in Eastbourne and work in Lewes and last year could not get out of my drive one morning but my colleagues in Lewes were staring at a green and pleasant land!
Also the conditions over parts of Europe now ( more to the East) would almost paralyse Britain .