About this data
- Counts people detected on arrival; it does not include people who arrived undetected.
- Rolling 12-month totals add up the four quarters to the end of each quarter, so each is comparable with a calendar year; the 12 months to December are the calendar year itself. They're the same 'year ending' figures the Home Office uses in its releases.
- Monthly figures come from the Home Office's daily counts, which are provisional and updated weekly. They differ slightly from the official quarterly figures used for calendar years and rolling totals (by fewer than 20 people a year), and run to the latest complete month.
- Most people who arrive on small boats go on to claim asylum, so they are also counted in the asylum application figures.
This chart appears in Migration.