The bit by your note is mapped as Wrabness Footpath 4 which heads north to the coastline and continues wast. The bit OSM still has to the west at the coast I think was officially diverted some years ago due to coastal erosion https://www.openstreetmap.org/way/73907525 The path to the west south of here is signposted as part of the Essex Way (and is Wrabness Footpath 1). It looks though liked you walked this bit that you marked as abandoned previously - should that be made footway again? https://www.openstreetmap.org/way/841278281