L5 common fire alarm for temp change to full evacuation in blocks of flats

[Suttonfire]

I note that the specification in the NFCC guidance for the above states that 'In EVERY flat, the system should incorporate heat detectors within each room that has a window that overlooks an area of  external wall'.

In practice, particularly in larger buildings, it is difficult to gain access to every flat to install detection. I wondered whether there would be considered to be a threshold at which a waking watch etc could be scaled back based on the majority of the flats having been fitted with detection? Or is it likely that the Enforcing Authority would insist on every flat being fitted with detection before other compensatory measures could be reduced?

I'd be interested to hear opinions on this.

[AnthonyB]

I would suspect that it would be on a case by case, brigade by brigade basis depending on the nature of the EWS failings

[Dinnertime Dave]

It says every flat for a reason. I don?t really think it is negotiable.