One is about 100m away from another and it’s the private platform of one of the railway owners (or mill owners, something like that).
Which one is that? Although I think if you are rich enough to have your own train you can probably afford a team of big ugly bodyguards to keep the common scum away.
Not quite the same thing but IBM used to have a station (IBM Halt) in Scotland for one of their big plants. Its finally been removed as a stop several years after the plant closed down (which is when i heard about it on one of the tech websites).
On the private vs current rail services thing. At Eridge station in East Sussex they have a Southern rail platform going in and out of London and the termination of a heritage railway at the other platform. Its quite impressive just how different the two stations look. One is pristine and the other not so much. Two guesses which way it falls.