Sunday 21st March, Census day in England and Wales. By law all households must complete their form.
The census has taken place every 10 years since 1801, except in 1941 (WWII). The first census based on households took place in 1841. The population has changed dramatically since then and in 2011 over 26.4 million households were included.
No results are likely until the end of 2022, however the impact of the COVID-19 pandemic on working patterns and household composition will ensure the 2021 census provides a unique snapshot of history in the future. Source: Dataloft, ONS, based on England and Wales, 2021 predictions based on latest population projections