Hiya, what sources are you using to assert that these three ways off Jevington Way aren’t private?

https://www.openstreetmap.org/way/972045110
https://www.openstreetmap.org/way/972045084
https://www.openstreetmap.org/way/856409059

They’re included within the Cadastral Parcels of the houses rather than the main highway, have a different surface from the main Tern Grove road, and their centrelines doesn’t appear on OS OpenMap Local. Those facts all point to them being private.