From reader Gordon Darge:

As a chartered architect in Scotland for 40 years I can confirm that the Building Regulations Technical Standards Scotland have for two decades required cavity fire barriers

2.4 Cavities
Mandatory Standard
Standard 2.4
Every building must be designed and constructed in such a way that in the event of an outbreak of fire within the building, the spread of fire and smoke within cavities in its structure and fabric is inhibited.

This includes for example, around the head, jambs and sill of an external door or window opening, at all floor levels and building corners etc. to prevent the spread of fire in building cavities. This would have prevented the spread of the fire at Grenfell Tower.

This is difficult and expensive to achieve and I can only guess that in England they did not follow the Scottish model because Westminster and the Tories were led by the vested interests of big business, property developers and large construction firms.

Gordon Darge.

For anyone wanting more info see
https://www.gov.scot/publications/building-standards-technical-handbook-2019-domestic/2-fire/2-4-cavities/