It’s because of the “fuck you I’ll do as I like” types that lockdown is more likely to happen.
The people who refuse to take personal responsibility and feel they should just be able to do as they like.
Bearing in mind that you’re not meant to meet up with others in the pub either, so even if you’re going for a drink you’re not going to be socialising.
The winter holds some interesting possibilities.
Firstly, the fact that the weather is colder means that less people will be outside. The beaches won’t have people on them and there will be less people in the parks and outside the pubs/restaurants etc in the street.
Secondly, there is evidence from other countries that the flu season is a very minimal one this year, and a lot of that is being put down to e.g. increased hand hygiene and social distancing. There’s a lesson in that, it shouldn’t have taken a pandemic for people to suddenly realise they ought to be washing their hands.... 
and this is something which surely should be drummed into children from the moment they are able to understand.
But this is likely why mixing households will no longer be encouraged, because the evidence is that it is because of mixing households that the virus is spreading again, and if people aren’t going out as much anyway (which generally happens in winter,) then household mixing is the way the virus will spread, and it will be better to prevent that where possible in order that the health service isn’t overwhelmed.
There are other positives, the death rate this time around seems to be lower, based on other countries. Also treatments are more advanced now than they were the first time round.