Park up at the top of Church Road from the funny double roundabout in Woburn Sands. Google maps shows this point as ‘Cyclone Mountain Bike Meeting Point’.
There’s a gate opposite the cottage. Once through the gate go sharp right, you should see the signs for the the trail.
The signs can be tricky to spot, and don’t take you back to the car park (god only knows why), but if you get to the end take a left through the woods and a right when you hit the wide sandy track, and you should get back to the car park.
Often when you park up someone else is about to go out and they’ll take you around. Sadly busy tomorrow myself…