Covid-19 is spread by human contact. To limit the infection rate we have to limit human contact. We have to limit the infection rate to prevent our healthcare system being overwhelmed, (we are already seeing this unfortunately, with the knock-on tragic consequences even for non-covid patients). Strict Lockdown seems to be the only effective way to minimise human contact. The first Lockdown worked extremely well, not even you can deny that surely. The transmission rate plummeted whilst it was in place and just after it. Subsequent lockdowns and Tier systems have not worked adequately simply because of a lack of adherence by a certain minority of Individuals. This has allowed the virus spread to rage completely out of control again. IMO, but without going into details, our splendid government is as much to blame for these failings as the anti-lockdown, anti-mask wearing fraternity. Lockdown is obviously not the long-term solution, it is merely a holding strategy until such time as sufficient vaccination of the population has been achieved. So called Herd Immunity acquired by protecting the Vulnerable whilst allowing everyone else to carry on life as normal with no restrictions could work in theory. However I do not believe that in practice it is possible without massive collateral damage. The number of vulnerable people is simply too large, and their lives are too interconnected with the rest of society. (Even if we don't include the numerous people whose vulnerability is due to lifestyle choices. I agree with the sentiment that they should not expect any preferential treatment). Look at what's happening right now with hospital admissions; and that's with semi-effectual restrictions in place. Imagine how much worse this would be without any restrictions in place.