It does seem to be the norm for the UK: “In the United Kingdom... residential buildings are designed with a stay-in-place firefighting strategy as opposed to si

It does seem to be the norm for the UK: “In the United Kingdom... residential buildings are designed with a stay-in-place firefighting strategy as opposed to simultaneous evacuation, and regardless of building height, maximum occupancies determine staircase width, resulting in many tall buildings serviced by a single stair core. On June 14, 2017, one such building, the Grenfell tower, was engulfed by the deadliest residential fire in the United Kingdom since the Second World War and cost the lives of 72 people. Subsequent inquiry determined that the negligent use of combustible cladding and insulation caused the rapid spread of the fire up the building exterior. The tower consisted of a 24-storey concrete structure with a single central exit stair, for which the shelter-in-place evacuation policy was sustained for more than 80 minutes before a general evacuation was ordered.” https://secondegress.ca/A-Wicked-Problem https://secondegress.ca/A-Wicked-Problem