Can i be arsed with your knit picking....
"Houses and flats built for public or social housing use are built by or for local authorities and 2. known as council houses, though since the 1980s the role of 1. non-profit housing associations became more important and subsequently the term "social housing" became more widely used, as technically council housing only"
1. Thats the key part........not councils.
2. And the other term COUNCIL HOUSES.......for housing pre 1980s. It was a lot easier to sell houses as councils compared to social landlords. Which is why the current regulations are changing to ALLOW social landlords to sell their stock in Right to Buy schemes
3. To be classed as Social Housing, you would need to be Registerd with The Social Housing Regulator. Which imparts a whle different rake of policy and procedure in the running, maintaining and purchase of housing.....also the rent was lower for social housing then for council housing, which is why some councils did stock transfers to become social landlords themselves or to Create a new Social Landlord.