Its feasible that future 'flu strains' or other coronaviruses will 'need to be nipped in the bud very quickly' in future. Its really not beyond the realms of possibility that the tier system becomes a permanent fixture in our lives, even if we get in and out of tier 0 on regular occasions. 77% of flu sufferers are asymptomatic, no one cared about it before but how can people ignore it now? The media certainly won't, and some people love to regurgitate what's in the media.
As I say, I'm pretty convinced the masks are here to stay too. Even after this there'll be people/media saying 'but don't spread flu around how hard is it to wear a mask' etc.
I hope I'm just being paranoid, but I think back to the last proper night out I had in March and can't help but feel it was the last night of the 'old world'.