I was pro-lockdown when we didn't have the vaccine, but don't know if all the measures the UK took were necessary to contain the virus, or if, on balance, certa

I was pro-lockdown when we didn't have the vaccine, but don't know if all the measures the UK took were necessary to contain the virus, or if, on balance, certain policies didn't cause more harm than good. For example, public exercise with other people was banned, even though open air transmissibility is low, and exercise improves mental health and coronavirus outcomes. What also happened, in addition to the above, is that people also avoided hospital treatment, and other illnesses, such as cancer, were deprioritised. These included young people, who would have not have been statistically at risk of coronavirus, but died unintentionally due to conditions caused by lockdown policies. In this case, quality of life adjusted years becomes relevant, and you have to justify measures taken primarily to protect the old, over being able to treat the young. Of course when I say "lockdown" it will have has different meanings, depending on which country one lives in. I think certainly some lockdown policies have done more harm than good, even though given another pandemic, I would support other lockdown policies, like banning large indoor gatherings.