Hi
I use all-season tyres all year...we get temperatures over 40 C in summer, and winter is down to minus 20 to minus 25.The extreme temperatures in the minus range are only for a few weeks, and in that period I don't drive...the drivers here are dreadful...so I either go by taxi, and let them buy winter tyres, or stay in.
All season tyres are more than adequate to minus 10, and after that, grip tails off...How many times will you encounter minus 10 in England??? co-incidentally, diesel fuel "Waxes", or precipitates at temperatures of minus 8 / 9, and unless the diesel you have is a GOOD winter diesel, air-chill can "freeze" the diesel in the bottom of the tank, if you are close to home...further away, the engine heat from the under tray CAN warm the fuel tank...but it's "iffy"....I have experienced this a few times here....
So....are winter tyres useful in England???....waste of money...buy GOOD all-seasons....Scotland is another matter...might be worth it
All-seasons in snow?....I have NO problems whatsoever...Switzerland, Northern Italy in snow...no worries....ALSO, remember, that in many countries, snow -chains are mandatory, so why buy winter tyres...sure as hell, the police will insist on chains, even if you have super-duper tyres...the law's the law
One good thing about snow tyres :....more profit for the company making them, and selling them in England
mmmm....you never know, they might start plugging them in Africa (just in case

)
Cheers
Helen
In the beginning there was nothing , then God said "Let there be Light".....There was still nothing , but ,by crikey, you could see it better.