At about the same time a short lived regulation was introduced for staircase pressurisation. This was to pressurise a single staircase on any public access building over a certain number of storeys (possibly two or three) A big F/O fireproof fan on the roof pumped a huge amount of air into the escape stair to prevent smoke build up. I think cost killed it in the end as it seemed to die a natural death.
Again, many car parks of that era were fitted with sprinkler systems, but, I assume, cost killed that as well.
At the end of the day, preventing these tragides costs a lot of money; a comodity that is a bit scarce in the public sector at the moment.