Question to the Home Office:

To ask the Secretary of State for the Home Department, how many and what proportion of applications for citizenship were refused in each year since 1994.

Historical data relating to those who applied to naturalise/registration can be found here:

https://assets.publishing.service.gov.uk/media/65d8886b87005a001180f8d9/citizenship-summary-dec-2023-tables.ods.

These summary tables report those who were naturalised, registered, or refused on tab Cit_02 since 1987.