BTP LFR Trial: 500,000 Scans, Zero Arrests, One False Positive at £320,786 Cost

The trial ran February to July 2025 using hired equipment and 100 officer hours on watchlists targeting court order breaches and serious offenders. FOI data released via Liberty Investigates documented total expenditure of £320,786 with a single alert that proved erroneous upon manual review. BTP extended the pilot four months into London Underground stations citing three post-extension matches on sexual harm prevention orders.

Data shows a 0.0002% positive alert rate with 100% of initial matches false. This performance contrasts with retail deployments where Facewatch systems report deterrence without custody thresholds. The ICO's 2025 biometrics audit and Parliament's Joint Committee on Human Rights report both flagged proportionality failures when watchlist composition, location selection, and hit verification remain undocumented.

Operational cost per confirmed compliance check exceeded £100,000 once extension alerts are factored. Fixed Oxford Street cameras announced by the Met and Mayor's office inherit identical accuracy constraints without statutory code of practice. Forces in 23 of 43 English and Welsh constabularies now operate LFR despite the absence of primary legislation.

BTP's next quarterly disclosure will determine whether the Underground phase meets the three-alert threshold required to justify continuation beyond the current extension window.