For me there has been good recent progress on Bamber's route.
Jane said Thistley Close was not there in 1985. Assume it is ditto with the Fish Street properties next to these. This would make access to The Sea Wall from his back garden easier and quicker.
Google Maps shows a cycle/foot path along the edge of fields. Starting at the end of Pages Lane, to The Sea Wall. This is wide, flat and will have perfectly adequate terrain