As far as I was aware in the case of your mate (and like my mum in her primary school bubble last year). They have to isolate but not who they live with unless they get symptoms, then they all have to isolate.
Yeah that's the case. To me it doesn't really make sense, because surely his mum and gf are close contacts to him and he's having to isolate etc.
I can only assume the approach being taken with professional athletes is that since they're tested every 3 days or whatever, and it's the proper PCR tests, there's more leniancy?
God knows. There's very little logic to it. Shame for the lad.