Yep spot on, for the bad weather we get in the UK is it really worth it.
Wayne...and Khare...you are both well off the mark on this...probably because you two are both southern fairies too!
If you live in rural areas, oop north - or heavens forbid, on the barely cultured side of Hadrian's wall...you may well see the benefits of winter tyres. If you'd tried them, you would know.
I came back onshore last Wednesday to snow. The temperature was below 5 degrees for 4 days...and at 4.5 degrees, Goodyear's finest were shocking...no grip...lots of wheelspin, lots of ESP activation, lots of ABS activation.
Hence, I have taken my BBS CHs with winter tyres down from my wheel rack, and will be fitting them soon.
In areas where roads don't get gritted, where there are no motorways, and light traffic, you need them if you want to go about your business through the winter.
I failed to have winter tyres for 1 out of the last 8 winters..and that one year I had to rely on lifts from people with cars on suitable rubber to get about. Not good.
If you don't get the weather, you don't need winter tyres...but spend 4 months+ below 7 degrees C (often below zero degrees C)
and you'll see the benefit.
Try them, and converted you will be.