My Landlord is bankrupt

My Landlord is bankrupt and his property up for auction by the bank. This is a sort of ‘status quo’ that may linger on a while. Meanwhile, the property is increasingly undermined by vermin, leakage an miscellaneous other. We are in the fourth month of our one year contract and so far not in any arrears. The leakage etc. is probably stoppable but the landlord clearly does not have the money to do so. I’ve prodded him by registered mail and then he gets active by dropping, but without any ammo; he just doesn’t have the money. What if I order a plumber myself and deduct the cost of that from future rents? I have announced this in the registered letter, which also went to the auctioning bank. The bank does not react. What is the role of the bank? I have copied them in on registered mail etc to avoid being blamed myself for the maintenance backlog. But as said, they do not react. I know there are good plumbers, so should I go ahead on my own initiative now? Cheers, Hans