I'm in London, and whilst everywhere is 'closed', bars, pubs and restaurants are still able to sell takeaways. The bar in my street reopened yesterday or the day before, and tonight I can hear voices gathered outside there again. During the November lockdown, there were hundreds there on weekends, so will be interesting to see how it is tomorrow night. Apparently the police are 'keeping an eye', but this only seems to happen during the day when the place isn't even open. The very first lockdown, the only places open near me were supermarkets / food shops (most with queues and someone checking numbers on the door) and a Gail's Bakery doing click and collect or takeaway only (massive queue every day). This time round, every café and restaurant has stayed open for takeaway / delivery (including Starbucks on Christmas Day!) and lots of shops were doing click & collect type stuff before Christmas at least (I haven't been out much since). It is far from quiet here, and you could see people packing up and coming back over Christmas too despite being told not to.
I'm lucky in that I've always worked from home, neither of us needs to commute and between us there has only been one off peak tube journey since March for a routine hospital appointment. I've probably only been inside a shop no more than 10-15 times in the past 9 months (already set up for online shopping, and so many other places here now offering all sorts of things delivered, so really hasn't been a need to), no children living at home, and a big park nearby, but I do realise that not everyone is as lucky in pandemic life.
Having said that, I realise it's a simple matter of wrong place / wrong time, and despite all of the above there's no guarantee I'm safe from catching it so try to follow the principle of 'assume you've got it' when out and about, rather than 'try not to catch it'.