as researched by Continental tyres and reported on the BBC web page today.
Which now mean not only will they be a magnet for every 4 wheel berk within miles of each who thinks s/he can drive, there will also be a mobile speed trap round every corner.
Great, thanks Continental and BBC!
Oh, and since they are already out there, they are:
B3081- Cann Common to Tollard Royal, Dorset/Wiltshire
A686 - Penrith to Melmerby, Cumbria
A537 - Macclesfield to Buxton, Cheshire/Derbyshire
A466 - Monmouth and Staunton, Monmouth
A4061 - Pricetown and Treorchy, Rhondda, Wales
A157 - Louth to Mablethorpe, Lincolnshire
B2130 - Godalming to Cranleigh, Surrey
B6270 - Keld and Reeth, North Yorkshire
A39 - Bridgwater to Minehead, Somerset
B797 - Mennock to Warnlockhead, Dumfries and Galloway
Normally you'd say now, add your own, but personally I wouldn't, keep it quiet and keep it safe.
The best twisty roads aren't in the UK anyway and everyone and his dog does the Alps and Gorge du Verdon, so try the Massive Centrale instead not as crowded and just as good.

Oops maybe I should have kept that quiet as well.
Ains.