https://phys.org/news/2018-06-grenfell-year-wrong.html

Grenfell Tower was built in 1974 and contained 120 flats, housing between 400 and 600 people. It was like a small vertical village. In 2016, the building was refurbished at a cost of £8.6m and this was when the cladding was introduced.

From the first media reports on the morning of June 14 2017, engineers and scientists raised concerns over how quickly the fire spread, especially on the outside of the building.