Running since 2015, the Census and Data Collection Transformation Programme (CDCTP), has three core objectives. 

Carry out a successful Census 2021 

The Census 2021 collection operation was a fantastic success with more than 97% of households in England and Wales completing their questionnaire. We published the first results on 28 June 2022 and have published topic summaries throughout 2022.   

More will follow through 2023, including multivariate data and analysis. You can read more  about our release plans. 

Transform our population and migration statistics 

The second objective has been to transform our population and migration statistics, in parallel with the census. The aim is to make a recommendation in 2023 about the future provision of population statistics. Find out more about how we are doing on the future of population and social statistics page. 

Transform our data collection activities 

The third objective is to make sure we leave a legacy by transforming the Office for National Statistics' (ONS's) data collection activities. We are transforming business and social surveys to become more efficient and responsive, putting the respondent at the heart of what we do, while also using administrative and online survey data where possible. We will also be renewing our technology platforms to ensure sustainability for the future. 

The Census and Data Collection Transformation Programme is due to come to an end in 2025.


Learn more about the progress of this project on the Census 2021 milestones page.

Further information

This programme will be evaluated in line with the ONS Evaluation Strategy

Detailed information about this programme can be found on the ONS's government major projects portfolio (GMPP) data page.

Read the accounting officer assessment for this programme.