Who is "the railway" ?
There are probably at least one hundred constituent companies in the UK rail industry, many with their own vested interests. I am guessing the owners of these are Roscos who would obviously prefer to earn a profit from them for as long as possible. However thirty years old and non compliant as they stand due to PRM toilets etc. They need a lot of money spending to make them useable and TfW and Scotrail prove they can be made compliant.
Are they worth it ? I understand that the compliant toilet module has to go in the opposite end of the vehicle to the as built toilet, due to the below solebar CET tank. This means a reduction in the number of seats anyway, but also some serious internal bodywork, seating etc.
So from your "no business" statement, are you suggesting the Roscos shell out monthly siding rent to park these units up, for the sake of growing mushrooms in them ? Storing takes the form of cold storage or "warm" storage and involves regular moving of the vehicles to prevent brinelling of the axleboxes as well as maintaining pneumatic, hydraulic and electrical systems in stored order.