I found a nice circuit just southwest of Milton Keynes, and invited SimplyPaul to join me in going round.
We parked at the village hall at Thornborough, and set off, on foot. We didn't go by bike, because the whole route was on footpaths, and I was expecting several stiles.
It went well, and we found all the caches; 22 in all, no DNFs. But by the time we got back to the cars, my legs were giving me grief, and I decided to wimp out of the second circuit.
Near the end of the circuit, we saw these great gates.