One thing we do know is that Labour were calling for a lockdown a couple of weeks before we did.
There's a case that even a week earlier would have halved the deaths:
https://www.itv.com/news/2020-06-10...n-halved-if-uk-entered-lockdown-week-earlier/
Imagine if we had locked down two weeks earlier, when cases were much lower. The peak would have been a lot lower, the pressure on the NHS/Care homes a lot less. Even if we'd started easing lockdown after the same number of weeks, the cases would have been significantly lower, so track/trace would be a lot easier.
One of the saddest aspects has been the way that care homes were treated. Labour were calling for covid testing of patients sent to care homes from hospital in late March/early April. On April 2nd the government confirmed that testing wasn't required, and the advice didn't change till the 15th April. There were numerous complaints from senior hospital managers that they were under pressure to discharge as many old people as possible, but that some care homes wouldn't take them without testing. Incredibly, these care homes were the "bad guys" at the time. Boris, retrospectively putting the blame on he care homes is astonishing, but not unexpected.
Keir Starmer wouldn't have spent those two weeks shaking hands with as many ill people as he could find, and so wouldn't have spent weeks in hospital/recovering when the country needed leadership.
Starmer was also banging on about planning for reopening a lot earlier. He got criticised by Boris for this, but the point is that the planning should have started the day we locked down - and if we'd have done that earlier we'd have had more capacity for planning it.
There would also have been plenty of mistakes. A Corbyn led Labour would likely have been less decisive, but I suspect he'd be bypassed early on anyway. I'd hope Labour would have admitted to mistakes (as more other leaders - apart from the obvious - have), rather than telling us they didn't happen.