Listen to this article in summarized format The UK is considering expanding the use of live facial recognition technology to identify visa overstayers and people who breach immigration rules, as the government steps up enforcement against illegal migration.
Privacy concerns over immigration surveillance The plans have attracted criticism from privacy and migrant-rights organisations, which have questioned the safeguards, transparency and potential for discriminatory outcomes.
He also said facial recognition used for immigration enforcement fell outside his remit, raising questions about independent oversight.
The technology has drawn comparisons with China's extensive facial recognition surveillance network, which has faced criticism from human rights organisations.
Separately, Home Secretary Shabana Mahmood has defended facial recognition technology for policing, describing it as a major breakthrough in identifying criminals.