I know of them through their work on the Skripal poisoners' passports (uncovering evidence that they're GRU agents). https://www.bbc.co.uk/news/uk-45656004 htt

I know of them through their work on the Skripal poisoners' passports (uncovering evidence that they're GRU agents). https://www.bbc.co.uk/news/uk-45656004 https://www.bbc.co.uk/news/uk-45656004