Is there an off road route from haldon down to kenn?

Yes. Look on OS for st andrews lane.. srarts from in behind cafeside..

There are several – St Andrews lane is good.

As above St. Andrew’s Lane is good, though I think the bridleway to the south of it is a better climb, and you’re less likely to meet someone else hooning down it.

Holloway Lane and then over Haydon Common Is fun, someone has cleared the route recently.

Cheers chaps. Running nice and fast and mostly dry. Got distracted by the cafe side DH runs and ended up riding through some fields to get back on track.