It seems like some people are desperate to be locked down, while others are desperate to be let out. Some people want there to be more rules, others don't care how many rules there are because they will break them all anyway.
The way it seems to me, a mandatory lockdown of any severity just isn't going to work any more. Everyone can always argue that it's not right that you can do one thing but not the other... there's no point while schools are open... or that keeping schools open is the only important thing and everything else should be sacrificed in order to do so. Christmas is a case in point: a load of additional restrictions put in place, but how many people went ahead with their plans anyway?
Those who don't give a damn will continue not to give a damn: if they can't meet up in a pub, they'll meet up in someone's home, and 9/10 times they'll get away with it.
And then there's the crucial point that, in order to bring about another "total lockdown", the government would have to actually get it past parliament. And that is by no means certain.
So isn't it time to simply ask people to be responsible, respectful and adult? Leave in place some restrictions about long distance travel and numbers of people who can meet up, perhaps, but otherwise simply put the responsibility onto each individual in the form of guidance.
If you work or live or come into contact with vulnerable people, it is wise to be more cautious. If you're a student and the people you're most likely to come into close and prolonged contact with are other non-vulnerable students, you can live a bit more freely. If you feel that you are vulnerable or need to protect yourself more, you should be permitted to wear PPE and distance at work, no matter what your profession. If you are clinically vulnerable, you should be certified as such and shielding and/or work from home or furlough should be facilitated.
Treat people like adults, and they might just start to behave like adults too!