This road was part of Volvo's Facebook campaign to find the best driving road.
That means there's another short video of the drive presented by Robert Llewellyn for us to enjoy.
http://www.motoringspy.co.uk/733/great-driving-roads-no6-the-b645-to-st-neots/
Starting in Higham Ferrers and heading east you'll pass through a series of small villages and historic market towns.
First up is Chelveston, then Hargrave, Tilbrook, Kimbolton, Great Staughton, Hail Weston and finally St Neots.
The B645 is an excellent route (only downgraded from an A road in the mid-ninties) with lots of open sweeping curves and good visibility which is typical of fenland roads.
It's similar to the B660 but much busier especially with bikers. Due to this popularity it's more heavily policed so watch out for speed traps.
As Robert Llewellyn says in his video, you could get to St Neots by roaring up the A1, but that would miss the point-it would also miss a truly epic driving experience.
