With reference to the Live Facial Recognition (LFR) deployment in Westminster on 28 January 2022, could you tell me: a) which watchlist was used, b) how many individuals were on the watchlist, c) how many faces were scanned, d) how many alerts there were, and e) how many false positives were found?

A bespoke list, consisting of wanted violent and serious offenders and those with outstanding arrest warrants issued by the courts, was authorised for use on 28 January 2022. 9756 individuals were included on the list. It is estimated that 12,120 faces were detected. There was a total of 11 alerts on the LFR system, with 1 confirmed false alert (equating to a false alert rate of 0.008 per cent).

Deployment records are published on the MPS website: https://www.met.police.uk/SysSiteAssets/media/downloads/force-content/met/advice/lfr/deployment-records/lfr-deployment-grid.pdf.