I live on a terrace with occasional side ginnels leading off the street to a communal back alley. Our house has a long way round to street via the communal back alley at the end of our garden.
Our house also has a quick way to the street via a legal right of way that we have through a gate and running across the back of next door’s garden pit to the street, down their side ginnel.
This same neighbour wants to extend their house at the back which would be built extending past the current gate we have into their garden and covering over the current right of way.
Because this path runs across their garden we rarely use it and would always ask first- so for example when we re-roofed and recarpeted and had a skip to fill, we used it then.
I’m fine with them building their extension, but they’d need to get a solicitor to legally change the right of way to fit with the new plan wouldn’t they?