There is no such thing as a right of obstruction. There is a right to park on the right of access but not a right to obstruct something.
You can get the deeds from the land Registry if the property is registered for a cost of £3 from this link.
you could get them for your property and for the neighbours property and if you needed the plans, each of those is another £3.
You will then know whether the right to park exists or not because it will be clearly noted in the deeds..
If this is on the public road, then people can park where they like including outside other people’s houses and they can do so for as long as they like. However they must not park across a dropped kerb.
Can I clarify anything for you?
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Thank you. That would be useful. If there is no vehicle right-of-way then you do not have a cause of action if you do not own the land unless you have a right of way over it and this of structural right-of-way.
You cannot object to it purely because somebody’s parking there and you don’t like it or it obstruct your view. It would have to obstruct some right that you have over this land or be a nuisance. It isn’t a nuisance just because you object to it being there.
I’m assuming that either you don’t know who owns the land and you don’t know whether there is any right-of-way in the deeds to the land or any right-of-way over that land noted in either your deeds or the other property’s deeds.