Likely needs an access=no tag.

Welcome. Is the building really called? "* Teddington Road"

Welcome! And Happy mapping. Thank you for bringing local knowledge.

s/where/were/ ;-)

When I last looked, the line did have a track bed where some sections could be used as a road, but the full routes definitely wasn't n fully passable as some sections where washed away or blocked.

Awesome! Thank you for improving the map. Any other local knowledge improvements greatly appreciated.