As I understand, all parties are UK resident individuals or companies? It's not a £250 pcm Leeds basement bunker, and it will get someone's attention eventually. Tax enforcement on individuals or companies receiving 1M+ of real estate income in the developed world is very good. Be prepared for an audit. I'd be careful.
1. The basic rule of rental income is that you can deduct the costs that help you maintain the income stream and value of the property, and that's about the end of legal methods.
2. It might be a good idea to put the title in a UK limited company and receive the income in the name of a company at a lower tax rate. Consider title transfer costs, all taxes, amortization, and time horizon (for how long does the quarry produce income?) to determine whether the title transfer is worthwhile. Any trained UK accountant can help you with the calculations.
Fancy more? If you want to go wild, consider pushing the limits of "arms-length".
Since it's a stone quarry, the obvious Achilles heel is in pricing. How many people are qualified to say how much a stone quarry is worth, or what it should rent for? At your own risk, receive a quarter of rental income in envelope
cash. Don't go greedier than 1/4, and you can argue that your price is "about fair" when probed by HMRC or auditors.