this is my backyard so can give some input
roady wise loads of great lanes and other fairly traffic free roads especially cross country between Sudbury and Finchingfield (which is picture postcard Essex village)
I also use the Flitch Way between Rayne and Bishops Stortford for gravel riding, as well as lots of Byways that you can link together
great Cafes for stopping at in the area – Rayne old station cafe, Blue Egg at Bardfield, great little cafe on the airfield at Andrewsfield, Blake End centre, etc
Forgot to add…going south some nice lanes out past Witham and all the way down to the coast at Maldon/Heybridge area as well
only downside of the whole area is there aint much in the way of hills…
Regards – U.z.