Have just rad that the 1921 census is closed until January 2022. The ruling by the Information Commissioner that resulted in the 1911 census being opened early does not apply to the 1921 census because, unlike the 1911 census, the 1921 census was conducted under the 1920 Census Act, which is still in force and which contains a statutory prohibition on disclosure.
In theory the 1931 census for England & Wales would have been available for public access in 2032 or perhaps earlier if rules were to be changed. However that is not to be.
On the night of Saturday 19 December 1942, there was a fire at a store in Hayes, Middlesex. The store, the responsibility of the Office of Works, contained a large amount of furniture but in addition it contained the census records for England & Wales for 1931, that is the whole of the schedules, enumeration books and plans. They were all completely destroyed.
Sandra