In my opinion, Lockdowns do not work, because there are too many groups of people who cannot lockdown. From doctors and nurses in hospitals, emergecy workers (police and fire), shop workers, bakeries, etc other medical emergencies re heart attacks, babies being born, etc
Secondly, the virus is still there when lockdown ends.
So, possibly banning the large crowd events such as the football match, and the cheltenham thing may have slowed the spread, but not prevented the spread of infection.
There have been several scientific articles claiming that the virus is airborne , which if so, then being outside, especially in the summer would help mitigate against infection.
Closing borders is pointless when we have nearly 10,000 lorry drivers coming into the country each day, from all over Europe.
If I were a Gov minister, I would try to have ensured that during the summer of 2020, that money was put towards increasing hospital capacity, and could cope with the inevitable winter surge (there is always a winter surge, and if not covid, then it would be flu).
But this also requires staff; so I would investigate how we could bring back recently retired doctors and possibly early graduation of final years nurses and doctors. This should be part of a plan going forward. ie maybe when doctors retire, (not all, but some) could be on a sort of reserve list for the following year. This requires an investigation to see if this is possible. When the (largely unused) Nightingale hospitals were built, it was mentioned of using nurses and doctors in their final years of university, so some kind of investigation into this should be made going forward, and how they would be implemented, etc
I think clsoing schools was the worse thing to do, because of the devasating effect on children's education, and on the families who were supposed to be working from home, and trying to homeschool their children at the same time.
I would also investigate early treatment methods. It seems to me that many poeple died when it first started because (anecdotally), people were told to stay at home until they went blue in the face. It later transpired that early treatment with oxygen was beneficial.