I wonder who they mean by 'someone else'? Random member of the public, 'Covid marshal', police, the army?
Apart from that part though, the only real surprise is that this 'creeped' so quickly from 'international travel' to 'walking down the street'. I expected them to go via public transport, shops, workplaces, etc. first.
I remind everyone that the idea of a 'freedom pass' (or as the PM called them, 'enabling tests') has been openly declared government policy since at least early September.
At some point we're going to have to decide what type of society we want to live in. And if we don't want to live in a Chinese-style social credit system where your freedom is entirely dependent on the say-so of the Government and an app on your phone - and I certainly don't - we need to make that *very* clear, and *very* soon, before we sleepwalk into exactly that.