NOTES: The Alton Estate is situated between Putney Heath and Richmond Park in south-west London. The smaller south-east part, Alton East, was built in 1952-1955, while the much larger north-west part, Alton West, was built in 1955-1959.
NOTES: Ronan Point, a 23-storey prefabricated council housing block, was built by Taylor Woodrow Anglian, using a technique known as Large Panel System building or LPS. This system relied on gravity holding everything together. On 15 May 1968 a natural gas explosion blew out the pre-cast concrete panels which formed the side of the building. The entire end of the block collapsed like a house of cards. Ronan Point, together with the eight other blocks on the estate, was demolished in 1986 and replaced with two-storey houses with gardens.