The owner of the class 27 should either get it scrapped, sell it or push it to working order again as it's been in that state for years. Why does someone buy a loco & then not have the funds to restore it..?
A classic catch 22. The 27 gets scrapped and is no more. Some enthusiasts get worked up. The 27 gets saved and sits rusting. Some enthusiasts get worked up. In the absence of money, the best that could be done is to put it under a tarp which will afford it a minimum of protection until there's a viable solution and who knows, perhaps the owner is trying to sell it? I'd say it's a pretty niche market though.
One of the sad but true facts about preservation is that those who are quick to talk, far outweigh those who actually do the work (the majority of whom do so for love, not money). The result is far more work than there are workers to go round and most preservation railways have to prioritise. This will be based on operational needs, historical significance, etc.
I'm not having a go at anyone, just suggesting reasons why locos, stock and so on, appear to lie around getting rusty for no
obvious reason.