Rights of access are usually contained in your title deeds. They are heritable rights which means that a sale to a new owner wouldn't affect the position. Do you have a copy of your title that you can scan to me? The other way that rights of access are created is through passage of time, called prescription, whereby use of the access by you or your predecessors for a period of a least 20 years uninterrupted would give you what is called a prescriptive right of access over the lane. Happy to discuss further and examine your title if you need me to. I hope that helps. Please leave a positive rating so that I am credited for my time.
If you have a right of access either by title or by prescription then he can't put a chain up to impede your right of access. As regards ***** ***** was never a legal concept of a servitude right of parking in Scotls law until a fairly recent case, called Moncrieff from recollection, and that case said that there was nothing in principal wrong with establishing a right to park if this had been done for the prescriptive period. Whilst the case rests on its own facts and some of the academic writers don't like it, you would certainly have a stateable case for a right to park. I hope that helps. Please leave a positive rating so that I am credited for my time.