Not strictly true. The (new) recommendations merely stated that all new buildings constructed after November 1968 and over five storeys were required to be able to resist an explosive force of 34
kPa (4.9
psi) (a value still used up until 2014). Only buildings that did not reach these values had to be converted or be supplied with electricity only. When I was training as a draughtswoman in a civil engineering office in 1967, none of the building regulations covered buildings above five storeys, yet the various Councils were putting up tower blocks all over the place. The tallest building we designed was a commercial building of five storeys, and even then the top storey was used as a dog kennels, complete with exercise yard. One problem with Ronan Point (and other blocks) was that the kitchens where the gas supplies were mostly used were on the outside corners of the building. The tower blocks where I lived had the living rooms on the corners and were deemed safer.