We don't have winter tyres because the expense wouldn't justify a few days.
Yup sounds about right Alan
Seems there are different strategies:
UK - Apply salt to melt the ice/snow to stop skidding. Plough snow if needed.
Nordic - Plough snow, don't worry too much about the ice as people have winter tyres. Some main roads salted, but of course when it is very cold the salt is useless anyway.
(For anyone interested in the stats, Finland uses around 80,000 tons of road salt a year, the UK can use 100,000 tons in a single night. There are 400,000 Km of road in the UK and about 100,000 Km of road in Finland, so you have four times as much road!
But salt is probably a cheaper option than having to resurface roads every 3 years because of tyre stud damage, and that's with our light traffic levels. There are ten times as many cars in the UK, so maybe with winter tyres your roads would require resurfacing every 4 months or so! Think of the disruption!)