In Germany and Austria, you need to have winter tires during the winter (in case there is an accident, there will be coverage in case you don't have winter tires).
In Switzerland, you can have summer tires unless there is snow.
So if there is an accident in clear day(not snow on the road) and you have summer tires, all is good.
If the same happens with snow, you have problem.
I am also aware about Greece where no one checks tires
I guess it's similar case in UK.