The new Snapchat augmented reality lens brings the Alan Turing £50 note to life (Mikael Buck/Snapchat) Snapchat has turned the new £50 note into an interactive celebration of Alan Turing, creating an augmented reality (AR) lens that brings the banknote to life when seen through a smartphone camera. When viewed through the Snapchat app, Turing’s portrait and quote on the new note are highlighted, before the dials of the Bombe code-breaking machine he helped develop and is also depicted on the note begin to turn. The machine’s dials then change colour to show the colours of the Pride flag, recognising Turing’s legacy as a key figure for the LGBTQ+ community.