In many commercial buildings and some domestic flats and tenements, fire doors are present, labelled, and in regular use. They sit in corridors, protect stairwells, and separate wokring and living spaces in line with what most would expect from a functioning fire safety system. At a glance they might appear to be compliant — but appearance is not synonymous performance. In practice, fire doors are one of the most commonly compromised elements within domestic and commercial bu