I ran an X Type Jag on its Summer tyres for 11 years without any problems, in fact on ice and snow the Mercs and Beamers were stuck yet I kept going.
Same with an Audi Q3,with its Summer tyres, two years and no problems at all
Same with my Summer tyred Turbo, the recent ice did not bother at all the ride or grip, no slips or slides.
You just drive to the conditions, smooth and gentle.
If you live in an area of the UK with far more wortst weather then you will be better off with a set of Summers and a set of Winters, a decent OPC will change and store them for you, if yours does not buy them from a different OPC. An 18" set of wheels and Winter tyres is about £1700
.
.
Unless you have to negotiate ungritted roads or heavy snow, you are
unlikely to need anything other than summer tyres. I do use winter tyres
which, on the rare occasion that we get some snow, will get me out of
our hilltop village, but once onto the main roads the surfaces are
usually wet rather than icy and all the winters do are increase road
noise and fuel consumption. Fortunately, I don't have to pay for them, but if I did, I wouldn't bother.
The other thing to remember about
winter tyres is that on snow, most of the grip comes from the sipes in
the tread blocks. These begin to disappear when the tread is about half
worn, so the tyre becomes less effective as it wears down.