@James-and-Nicky0
UK and US are different so bear with me.
When you say "lease" I assume you don't own the apartment. While you have some rights to renew your future lease, owner is under any obligation to re-rent to you especially - if you break their rules.
Owners have now aribitrarilty changed their minds about letting you do airbnb.
You may argue that you may continue to rent through airbnb because the owners "Waived their rights" when they turned a blind eye to your airbnb business.
It is a valid argument. However, how will you feel if they don't renew your lease?
My advise is to negotiate with the owners. Offer them their 'cut'. Emphasize your guests' discretion.
Ask owners how it could work.
I know as a landlord, I'd be pissed if my tenants were illegally subletting. However if I could get my share, either through profit-sharing or higher rent, without any increase in problems, I'd be happy. I could also withstand the complaints of the older tenants.