Michael, very interesting.
Let's hope it avoids future tragedies. Interesting that hotels are not included, perhaps existing legislation cover such places. Part of the problem with Grenfell was that safety tests on materials were inadequate, and inappropriatematerials were used for cladding.
The 18m (approx 6 stories) falls in line with the National Fire Chiefs' Council NFCC link, presumably to do with firefighting equipment and techniques..It won't apply to too many house extensions (having just gone through the trauma of that, I wouldn't have wanted too much more bureaucracy!), but these kinds of requirements have a tendency to creep.
The presenter did upset me a bit in his intro with "a excerpt…," but I guess I have to get used to 'evolution of the language!
Bill