I have the dubious pleasure of being the freeholder of a purpose built block of 4 flats in Brighton . The lock on the door is knackered. It keeps on locking, when it should be shut. I've had people over to try to resolve it, but to no avail. I think that a replacement door with some kind of guarantee is the answer. Can anyone recommend a company that could do this? Each flat has a door entry system, which probably complicates matters. One of the flat owners had an ambulance over earlier, and they couldn't get in! I could do without the constant hassle, and seek a permanent resolution.