There has to be a balanced approach. Yes there are doors out there without any certification or markings to suggest that they are BS complaint but, and its a big but, does that mean they need to be changed?
Several housing associations I know since Lakenhall have undertaken reviews of their high rise stock and highlighted several, (what they concieve to be) non compliant flat entrance doors. They have replaced tenants doors recentlyat considerable expense across their estate.
Leaseholders (owner occupiers) have been written to asking to provide evidence that their flat entrance doors are suitably F/R only to be told "its the door that you (the housing association) installed X years ago" or "but its the original door installed since the block was built"
Sounds like a knee jerk reaction, especially as some assessments only looked at the door from the communal area, and didn't fully check the door. But time, resources and lots of other factors mean housing association take this approach.
Its difficult. Housing associations / providers are stuck between a rock and a hard place.
I don't wish to sound like I'm supporting a particular individual or organsiation but I have to say CS Todds' guidance document on fire safety in high rise flats is a damn good read, and brings these matters into perspective. The balanced approach, common sense etc.
Non of us could look at a door and say for definite if it was suitably fire resisting unless it was supplied with certificates or had markings but some of us would be able to give a better educated guess than others.