I wish Apple and Google had rolled out the COVID19 contact tracing apps themselves. I understand that it would be really difficult to do - but I’m also baffled and frankly horrified that the UK decided the approach they’re using is better. If you tell a machine to exchange anonymous codes with other machines it will do it. If you ask me to identify the man in a blue tshirt who sneezed in the supermarket yesterday… We’re doomed.