If I was childless, then yes, I could do this for a year (if you ignore the impact on the economy etc). I’m not much into pubs, shopping etc and I would be happy to sacrifice seeing my friends for a few months, as adults we can zoom etc. We have savings, can work from home etc.
But for us as a family- no, absolutely not. Children have a short childhood as it is, a year without any peers to play with, other people to talk to, access to playgrounds or pools or play dates or education? A quarter of my preschoolers life in isolation? (And that’s just my very privileged kids, who knows what this is doing to children living with abuse, poverty, parents suddenly out of work and the rest.) Not a hope in hell, not unless it was to their direct benefit. Not to keep predominantly elderly and late middle aged people from catching a virus that is still unlikely to be fatal even to them. Not to “save the nhs” either. I’m as law abiding as they come, but I’ll be joining the civil disobedience should this come to pass. Which it won’t because however much people want to save lives, we simply cannot afford a year long lockdown even if people would go along with it.