I seem to remember that British Rail Property Board (Residuary Body) owns assorted large railway stations with high land/property values.
This was definitely not made clear in the Rail track share prospectus , but was revealed when Railtrack went "bust", thus significantly reducing the perceived share value.
I googled, and I found this - apparently BRB is no more:
https://www.gov.uk/government/news/brb-residuary-ltd-has-been-abolished
Interestingly, this page also confirms what I mentioned about LCR owning Waterloo International & North Pole.
Plus also describes another separate body called Highways England Historical Railways Estate that own assets on closed routes.