The UK 1921 Census was released on the Findmypast website on 6 January 1922. But brace for a census drought.
The UK 1931 Census was lost in a fire and the 1941 Census was cancelled because of the war, (although we do have the 1939 Register to refer to).
That makes the UK 1951 Census release to be in 2052. Very unlikely I'll be around for that one!