Question to the Home Office:

To ask the Secretary of State for the Home Department, pursuant to the contribution of the Minister of State for Border Security and Asylum of 17 November, Official Report column 468, what percentage of migrants arriving in the UK by illegal means in each month since the general election did so without any reliable documentation of their (a) identity and (b) nationality.

This information is not available in an easily accessible format.

However, the Home Office does publish statistics on irregular migration, which include data on Inadequately Documented Arrivals (IDAs). IDAs refer to passengers arriving in the UK by air who are either undocumented, travelling with fraudulent documents, or without the correct documentation required for travel or entry.

For data that is available since the July 2024 General Election (Calendar Year Q3 2024 – Q2 2025), there have been 3,266 inadequately document irregular air arrivals.