Hi Michaela - when land/property is registered the first application provides the deeds/documents that confirm ownership and how the land/property has been conveyed over the years. If those deeds/documents then contain covenants, rights, provisions and more then the appropriate entries would be made on the newly created register. That is our role to convert the old deeds/documents into a register and then return the deeds/documents to the applicant.
Thereafter the owner and any other interested party would rely on the registered information and not the old deeds/documents as we then guarantee the title including ownership and registered covenants etc
The issue and Qs raised are really ones for your legal adviser to answer - we are a registration authority only but I have tried to offer some general assistance in my reply
So in answer to your points as raised
1. No unless they were included in deeds/documents not supplied on first registration or since
2 and 3. We would not know what 'normal' looks like in that scenario. We register the general boundaries and for example covenants, agreements or provisions that relate to same as applied for and appropriate. If there is an issue re a boundary re who is responsible for it or who owns it then that would generally be a matter for the adjoining landowners to then discuss and agree upon.
I should stress that there is a legal presumption that land/property owners can own land up to the middle of the highway/road. When the road is adopted by the local authority they adopt the top few inches and the legal ownership is unchanged. The registered title will very rarely be mapped to the middle of the road though -
see PG 40 sup 3
The forum, whilst public, is very much a Q & A between customers and HMLR. It would be very rare for others to also post on threads in the way they might on other online forums.
If you are looking for others to share their own understanding/experiences I would recommend using public forums such as Garden Law for example where such matters are often aired, shared and discussed