What drove the rise in terrorism-related arrests in Great Britain
REPRODUCE THIS INVESTIGATION

Repeat the headline comparison from the original published cells. You do not need coding or individual case data.
You will need: A web browser, a calculator, and LibreOffice Calc or Excel to open the Home Office ODS annual tables. Download the text calculations for the exact inputs, cells and source-file hashes.

ACCESS AND DATA LIMITS
These steps reproduce arithmetic from published aggregate tables, not an analysis of individual arrests. They cannot establish unique people, attacks, guilt, underlying terrorism, policy merits or motive. The caption was checked, but the full reel audio and video were not. No filters or record-level exclusions were applied: the only separate comparison is the Home Office subgroup already published in table A.01c.

WORKING FILES
Source notes: https://tallycat01.com/downloads/gbnews-terrorism-arrest-numbers-source-notes.txt
Timeline: https://tallycat01.com/downloads/gbnews-terrorism-arrest-numbers-timeline.csv

1. Open the release and the right workbook
Open the Home Office release published 8 October 2026, then download the annual tables to June 2026. Open worksheet A_A_01. The columns are Y for year ending June 2025 and Z for year ending June 2026. The geography is Great Britain: England, Wales and Scotland. The unit is recorded terrorism-related arrests, not unique people.
Keep in mind: Use the source version retrieved on 8 October 2026. The calculations download records its SHA-256 hash. A later revision may give different values.
Home Office release: police powers to June 2026: https://www.gov.uk/government/statistics/operation-of-police-powers-under-tact-2000-to-june-2026
Annual terrorism tables, June 2026: https://assets.publishing.service.gov.uk/media/6ac65d8bb016250bca0139b7/operation-police-powers-terrorism-jun2026-annual-tables.ods

2. Check the rise in all arrests
In table A.01a, inspect A_A_01!Y15 (234) and A_A_01!Z15 (3,867). Subtract the earlier value from the later one, divide by the earlier value, then multiply by 100. Round only the final percentage to the nearest whole number.
(3,867 - 234) / 234 × 100 = 1,552.5641%
Rounded result: 1,553% increase
Annual terrorism tables, June 2026: https://assets.publishing.service.gov.uk/media/6ac65d8bb016250bca0139b7/operation-police-powers-terrorism-jun2026-annual-tables.ods

3. Find the share linked to supporting Palestine Action
In table A.01b, inspect A_A_01!Z25 (3,630). Divide by the latest total in A_A_01!Z15 (3,867) and multiply by 100. The denominator is all recorded terrorism-related arrests in the same year and geography.
3,630 / 3,867 × 100 = 93.8712%
Rounded result: 94% of the latest total
Annual terrorism tables, June 2026: https://assets.publishing.service.gov.uk/media/6ac65d8bb016250bca0139b7/operation-police-powers-terrorism-jun2026-annual-tables.ods

4. Check the separate Home Office comparison
In table A.01c, inspect A_A_01!Y35 (234) and A_A_01!Z35 (237). Apply the same percentage-change formula, using 234 as the denominator. Reconcile the two current subgroups to the published total.
(237 - 234) / 234 × 100 = 1.2821%
Rounded result: 1% increase
3,630 + 237 = 3,867
Keep in mind: This is the published subgroup comparison. Subtracting a subgroup does not estimate what would have happened without the ban.
Annual terrorism tables, June 2026: https://assets.publishing.service.gov.uk/media/6ac65d8bb016250bca0139b7/operation-police-powers-terrorism-jun2026-annual-tables.ods

5. Read the counting rules before interpreting the result
Open the Home Office user guide and use the browser search for arrests, postal charge requisitions and summonses. Read the arrests definitions and counting rules. The series can include cases under other legislation judged terrorism-related, and a further arrest on a different occasion for a different offence can be counted separately.
Keep in mind: Do not turn the totals into attacks, convictions or unique people. The smaller comparison remains terrorism-related arrests.
Definitions and counting rules: https://www.gov.uk/government/publications/user-guide-to-operation-of-police-powers-under-the-terrorism-act-2000-and-subsequent-legislation/user-guide-to-operation-of-police-powers-under-the-terrorism-act-2000-and-subsequent-legislation

6. Repeat the separate hate-crime arithmetic
Open the hate-crime data tables, worksheet 2. All offences use B23 (137,560) and C23 (146,825); race uses B17 (98,890) and C17 (107,926); religion uses B18 (10,067) and C18 (11,419). For each row, calculate (current minus previous) / previous × 100 and round the final result.
All: 6.7352%, rounded 7%
Race: 9.1374%, rounded 9%
Religion: 13.4300%, rounded 13%
Keep in mind: This is England and Wales, years ending March 2025 and March 2026. It has a different geography and period from the arrest series. Do not combine the counts or infer causation.
Hate crime, England and Wales, year ending March 2026: https://www.gov.uk/government/statistics/hate-crime-england-and-wales-year-ending-march-2026/hate-crime-england-and-wales-year-ending-march-2026
Hate-crime data tables, 2025 to 2026: https://assets.publishing.service.gov.uk/media/6ac510c0a4449136071df94d/hate-crime-england-and-wales-2025-to-2026-data-tables.ods

7. Compare what the caption says and record the limits
Open the original GB News caption. Compare its almost 3,900 arrests, more than 1,500% rise and fewer than 250 a year earlier with the exact values above. Keep its stated distinction between arrest and being charged or convicted. The arithmetic supports those headline descriptions.
Keep in mind: This checks the caption and official data. It does not assess the complete reel, establish deceptive intent or decide the merits of the policy.
GB News Instagram reel and caption: https://www.instagram.com/gbnews/reel/DeOq1RKAGI9/

Evidence checked: 8 October 2026
Research and production assisted by AI