This is what I said on Monday:
Quote: "Also, the weather in the UK tends to hover around 0 Celsius in the winter so snow often turns to rain (or vice versa), which then washes away the salt, so it's all gone by the time the temperature falls again."
Since then the following has happened here:
1. Snowed in on Tuesday - village cut-off, except on foot (not much help when you work 35 miles away and no buses nearby).
2. Snow melts during Wednesday/Thursday accompanied by rain, washing away most of the salt in the few places it had been used.
3. Roads and surrounding countryside completely clear of snow on Thursday and it was raining while I drove home.
4. Snow returns Thursday evening and night onto roads which have just been washed clean of salt by the thaw and rain.
5. Today, Friday, our village is cut-off by snow again.
And, surprise, surprise, local authorities are running low on salt. I heard on the news today that London alone has used 50000 tons of salt in the last few days - and the UK's salt production capacity is 30000 tons a week (which is probably more than sufficient in the summer

).
I don't think the local authorities could realistically do much more - and neither can the weather forecasters.
Edit And I shudder to think what all that salt does to the environment. A lot gets washed harmlessly into the sea - but not all of it by any means.