The force also acknowledged people’s concerns with regard to privacy.
A spokesperson said: “Data collected via LFR is handled according to data protection laws and regulations.
“Images of people who do not match anyone on the watchlist are immediately deleted and cannot be recovered.
“All CCTV footage from mobile deployments is deleted within 31 days unless it is required for an investigation.”
Tucker added: “So before we deployed this, we spoke to a number of different community groups, tried to allay any fears around that.
During its first use on 19 May, police scanned 34,000 faces in a six-hour operation on Bridge Street and Long Causeway, leading to the arrest of two men wanted for failing to appear in court – one accused of theft from a person and the other of shoplifting.
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