Arrest Data by Nationality

Freedom of Information (FOI) Act request ref: 01/FOI/25/008533/X

Version Date: 11/08/2025

The Performance & Analysis Department have provided the following information.

Data source :
Force custody recording system - Niche and Unifi

Data Processing:
Qliksense Detainee Management app
Arrest date between 01/04/2018 and 31/12/2024
Arrest data and Custody Records tabs
Nominal nationality in Custody records matched to nominal in arrest data

Qliksense Occurrence - People Links (all) app
Offence description and offence group matched to arrest offence code from Detainee Management results

Qlikview Unifi -Custody Data report
Arrest date between 01/01/2015 and 31/03/2018

Data Limitations:
An arrest record can include multiple offences. The nationality table counts offences/arrests only once.
A detainee can be arrested for other reasons than an offence e.g. a warrant

Total number of arrests of people of the following nationalities for the years 2017 - 2024: Iran, Afghanistan, Iraq, Albania, Syria, and Eritrea