Quite a nice fast stretch with some open corners. There can be some farm traffic here periodically and thus mud on road.
Royston to Puckeridge section:
From Royston, at the small one way system in the south end of royston head out east towards barley. this first section once out of town has some fast clear straights and blind corners. once through barley the road opens out again and twists and turns over crests nicely, though theres a few deceptive ones with no obvious indication of which way the road goes - take care! theres a few small villages on the route with 30mph signs but out of there its fast as you like, buildings are mostly farm houses etc, so beware of farm traffic. ive seen the odd police car sitting in a field entrance between crests a few times but its not that common. towards the south end theres a couple of railway bridges that will get you airborne if you hit them too fast and one has a tight bend after it. overall a good road thats not over used by cars or by bikes, more fun and quieter than the A507!