Maybe ask your line manager what is and isnt allowed inline with your TOCs policy. It'll vary between each TOC but not much.
And its not fair when I get grief from staff about growing my beard yet I tell em off for when they try and grow theirs
Are cleaners the only thing you could come up with?
I can tell you there are many MANY customer facing rolse that wont even come close to earning £40K upwards per year - probably not even in 2 years. Your generalisation of the wages that rail staff earn shows a high level of ignorance.