The Met Police says it has previously used the technology to catch dangerous offenders.

Photos taken of suspects arrested in Scotland are often too low quality to be used to detect crimes.

The police force hopes the technology will be used again in the future.

A one-day trial aims to find and arrest suspects wanted for serious offences, a police force says.

It will enable police to confirm the identity of someone who is unable or refuses to give details.

Police say the system raised 14 alerts after matching faces captured on CCTV to a 'watch list'.

The kit "deletes your image in a fraction of a second" if you are not on a watch list, say police.

The AI technology sees cameras scan crowds of people and match faces to a police watchlist.