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Immigration system statistics: small boat arrivals, asylum claims and NRM referrals datasets
Reads Data_IER_D02 (small boat arrivals by whether an asylum claim was raised), Data_IER_D03 (initial decisions on asylum claims from small boat arrivals by case outcome group), Data_IER_D04 (small boat arrivals by whether a National Referral Mechanism referral for modern slavery was raised) and Data_IER_D05 (outcomes of those NRM referrals), all from 2018. Data for 2026 Q1 onwards is provisional.
- Official page
- https://www.gov.uk/government/statistical-data-sets/immigration-system-statistics-data-tables
- Authority
- First-party official statistics · OGL-UK-3.0
- Latest release
- Year ending June 2026, published 27 August 2026
- Next scheduled
- 26 November 2026 (official date)
- Extractor
- ingest/ukdata/extractors/ho_illegal_entry_dataset.py
Metrics read from this publication
| Metric | Sheet · table | Row label | Unit |
|---|---|---|---|
| Small boat arrivals by whether an asylum claim was raisedbreakdown by asylum claim | Data_IER_D02 · IER_D02 | all rows | people |
| Initial decisions on asylum claims from small boat arrivals | Data_IER_D03 · IER_D03 | all rows | decisions |
| Initial decisions on asylum claims from small boat arrivals by outcomebreakdown by asylum case outcome group | Data_IER_D03 · IER_D03 | all rows | decisions |
| Small boat arrivals by modern slavery referralbreakdown by nrm referral | Data_IER_D04 · IER_D04 | all rows | people |
| Modern slavery referral outcomes for small boat arrivals | Data_IER_D05 · IER_D05 | all rows | referrals |
| Modern slavery referral outcomes for small boat arrivals by outcomebreakdown by nrm case outcome group | Data_IER_D05 · IER_D05 | all rows | referrals |
Releases ingested
| Published | Release | Observations | File |
|---|---|---|---|
| 27 August 2026 | Year ending June 2026 | 592 | ier.xlsx sha256 72071ed0ce3777a2… |