Hi Ben - title HD617240 was created after being transferred out of title HD513538 and that title remains in the same seller's name.
You can see what land was transferred at the time in the Transfer dated 1st July 2022 and filed under title HD617240
I suspect that will clarify how and why the new title was mapped in the way that it was and creating the issue you now see.
However you might be referring to that TP1 (not TR1) in your post and I would suggest that it doesn't show that the transferred land abuts the road but the transferred extent runs at a straight tangent off the mapped garages thus creating the issue you are referring to.
Now the caveat to add here is that OS detail can and does differ over time so the detail that existed in 2022 may then alter as an when the area is surveyed again by OS. But we register the general boundaries at the time that a title is created and mapped so the registered extent is not designed to show the precise legal boundary
In the circumstances and if you believe an error has been made re the registered extent of HD617240 then you should use
our contact form to report the error and our support team can take a look and offer an official response
The purpose of my post is an effort to try to explain how the titles might have been ,mapped in the way they have been and to clarify the TR1/TP1 point made.