Yes, land movement is happening inland of the road. Discussed in my email to Talk-GB mailing list. A few posts later there's discussion about the new route of "English Coast Path". It's been rerouted to the south along the footpath but we don't have a OSM suitable source yet. Bus route is a problem because it doesn't appear to be a public bus route and there's a lack of publicly available route data.

https://lists.openstreetmap.org/pipermail/talk-gb/2023-March/030133.html

Issues with pedestrians getting around initial barrier, so it has been heavily f