Drive-by with ample safe parking.
Cache is a bright orange micro located at ground level and is not in the wall which forms the bridge (or any other wall for that matter!).
This is a beautiful part of the Lake District, the nearby Caldbeck commons are a great place for a picnic and if you take the road heading west out of Mosedale (signposted Swineside) there are loads of pools along the Caldew which are excellent for a swim or a paddle on a hot day!
*** CONGRATULATIONS TO HEATHER W ON THE FTF ***