A H line is a line about the width of a driveway with a short bar at each end painted on the roadside to prevent parking outside driveways , in this case there is no driveway just a pavement and the line is about 2 car lengths does this have any legal status.
When you say the line, I assume no-one can park there?
Who painted this?
The line is NOT for her own private use.
This is because the lines are for Highway use, not for individual use.
Therefore the answer is no, the neighbour can not insist this is just for their own use.
If it was for their own use, there would be a residence permit - there is not.
Can I clarify anything for you about this today please?