:?
How many homes were taken out of local authority stock in those periods?
The equation is surely homes out minus homes in?
To understand what was happening in that period, you have to have some knowledge of local authority finance and housing policy. The simple figures lead to the big misunderstanding which Jon displays.
For example, the policy changes the Tories made choked off council housebuilding, but this didn't really start to bite until the mid-80s. If you check out tables of local authority house completions year by year, you will see a massive change from the early 80s to the late 80s. The reason for the low completions under Blair is that the policy remained in force - and the tiny numbers show how effective it was at stopping councils building.
Another factor is that grant was redirected from councils to housing associations. But they had to borrow to make up the grant, meaning loans from the City, paid for by rents, largely subsidised from housing benefit - so tax income was directed towards making interest payments to city firms. Nice business for Thatch's mates, and of course the growing housing crisis meant a revival of the largely crappy private rented sector, and a crisis in homelessness, meaning exorbitant fees paid to slum landlords, another of her constituencies of support. Taxes redirected into astonishing profits for slum landlords keeping people in dangerous conditions.
And of course council house sales drove the imbalance in supply and demand which drove this mad equation.
Was it all Thatcher's fault? Possibly not. Maybe there were a few local factors at work. But as a quick overview, was the housing crisis of the 80s and 90s, and the countless tales of human misery which lie behind the figures, driven by Thatcher's and the Tories' efforts to redirect public money into the pockets of themselves and their mates? Yes, without question.