Question to the Department for Levelling Up, Housing & Communities:
To ask Her Majesty's Government whether they make any distinction between (1) social housing, and (2) affordable housing, when collating statistics on the number of homes built exclusively for rental.
Yes, the department makes this distinction. Information on affordable housing by tenure is publicly available, including for social rent and affordable rent, for both starts on site and completions.
This information can be found (attached) here https://www.gov.uk/government/statistical-data-sets/live-tables-on-affordable-housing-supply