From the Scottish Government in October 2022:

Across the 14 years between 2007/08 and 2020/21, the annual average supply of affordable housing per head of population in Scotland has been 13.9 homes per 10,000 population, higher than England (9.7 homes per 10,000 population), Wales (8.0 homes per 10,000 population), and Northern Ireland (13.0 homes per 10,000 population – average across the years 2010/11 to 2020/21).

The 9,757 affordable homes completed in Scotland in the latest financial year 2021/22 equates to a rate of 17.9 homes delivered per 10,000 population, the highest rate since 2007/08.

https://www.gov.scot/publications/housing-statistics-scotland-quarterly-update-new-housebuilding-affordable-housing-supply-published-04-october-2022/pages/7/

In the Guardian today:

Forty councils in England saw no social rent housing built in five years in the wake of government funding cuts, according to official figures analysed by the Observer. In 2010 the Conservative-led coalition slashed funding for subsidised housing by 60% and redirected the remaining money away from social rent and towards more expensive “affordable rent” housing.

https://www.theguardian.com/society/2022/nov/13/forty-councils-in-england-built-no-social-housing-for-five-years-due-to-cuts