ConnectingDots
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Whilst online Land Registry maps are never 100% conclusive, this is fairly clear that the platform is not within the land owned by Station Cottage:
View attachment 164933
It also looks as though the Station Cottage property was carved out from the rest of the land when the cottage was sold on in 2021. It looks like the vendor (presumably the businessman who the cottage owner alleges is running an illegal landfill and scrap yard five miles from the nearest road) retained the rest of the land.
The foot access to the platform is to the northern corner of the Station Cottage land and so wouldn't cross the home owner's property marked in red in the above image. Access for road vehicles would cross the home owner's property.
Sounds like the home owner is madder than a cut snake, tbh, but it will require the Court to determine the extent of the property rights. Which will be why it's taking so long to sort out.

Station House CTH7726 was sold to the landowner in 2021 by the 'businessman's' wife. The 'businessman's' wife owned the property, not him. The 'businessman' and his wife have retained ownership of any land at Altnabreac and so your presumption is incorrect. Other areas of land owned by the landowner is registered in the General Sasines Register.
As you will see from the satellite versions of the Station House title above, which can be found by searching the cadastral mapping system on ROS, the entrance and the footpath/driveway used by members of the public to access the station IS within the landowner's registered title and so you are incorrect by claiming that members of the public do not need to cross the landowner's land to access the station. However, the issue is not about members of the public accessing the station as they have a right to. Members of the public access the station by entering a side gate that leads directly onto the landowner's land to access the platform area. Even though the station has been closed for almost a year, members of the public continue to visit the station (walkers / cyclists) and the landowner enjoys meeting and speaking to the public. Network Rail, as a commercial body, do not have a legal right of access to use the landowner's land without his permission. The landowner did not support the closure of the station and has been trying to work with Network Rail to resolve matters speedily to enable services to be reinstated as quickly as possible.