https://www.theguardian.com/uk-news/2019/aug/12/regulator-looking-at-use-of-facial-recognition-at-kings-cross-site

Information commissioner says use of the technology must be ‘necessary and proportionate’

The UK’s privacy regulator said it is studying the use of controversial facial recognition technology by property companies amid concerns that its use in CCTV systems at the King’s Cross development in central London may not be legal.