Winter Tyres In The UK - Are They Worth It?

We've fitted winter tyres to Mrs Local's Mini JCW. Will it turn out to be a worthwhile investment? Or a waste of money? I take the Mini out on some high roads in Cumbria in the first snowfall of the year to find out.
Previous winter driving video (on summer tyres):
• 25. UK Winter Driving ...
Siberia winter driving videos:
• Driving in Siberia Par...
• Siberia Part 2 - Count...
• Siberia Part 3 - Russi...
• Siberia Part 4 - Off R...
4WD car with summer tyres V 2WD car with winter tyres:
• 4WD VS Winter Tyres - ...
For more info on advanced & performance driving & Roding, visit my website www.reglocal.com & Gove me a follow on Twitter @RegLocal