We are owners of the flat in London. 1 month ago there was a leak from the flat above and the flat manager and it's owner refused to react on time and it made a huge damage (including collapsed ceiling) in our flat. Few days ago there was another leak from their flat and again are delaying the process of finding the source of the leak. We would like to force them to act, to claim the damage at the insurance company, to organize and to finance the refurbishment. Because of their negligence it's the second time the health of our tenants and our property is put on risk. We would like to know what can we do. Thank you in advance for the contact and help!