I own a leasehold 1-bed ground floor flat in a Victorian house (converted house into 2 flats) in London. The freeholder is a Plc company and they have written to me asking that I change the entrance door to my flat to make it fire-proof, including the door, hinges, intumescent strips etc. Issue I have is that I have a very small entrance to my flat and I bought this property just a year ago and they always had sliding door in place due to the small entrance available (since entrance door to upstairs has taken up all the space). So I have had builders and companies come and inspect it since and they pretty much all said that traditional normal door can't be installed as it can't be opened fully inside or outside. I had ordered fire proof kits for sliding doors (from Hafele) but again when they tried to install it they needed weights to be added to door (to have self closing mechanism) which again means space would be restricted so I couldn't move furniture/appliance in and out of the apartment. The freeholder basically said they will enforce me to change the door to make it fire proof or else I am breaking the lease. I have told them I am happy to do the works but no company is able to do the works without completely restricting the entrance space. Does anyone know if this is legal? Can the freeholder really force me to do this? I have called the London fire brigade to get advice, but they couldn't really help (they couldn't tell me if this requirement is mandatory or not). Any advice or help would be much appreciated as I don't want to pay thousands to do this work (as it would be custom made) only to end up with tiny space to squeeze in and out of and no way to get furniture in and out of my apartment). Thanks!