There's an analysis here: https://www.revk.uk/2020/09/how-not-to-qr-nhs-c19-app.html https://www.revk.uk/2020/09/how-not-to-qr-nhs-c19-app.html Whole thing is

There's an analysis here: https://www.revk.uk/2020/09/how-not-to-qr-nhs-c19-app.html https://www.revk.uk/2020/09/how-not-to-qr-nhs-c19-app.html Whole thing is a bit OTT.