Interesting question. I found an email I wrote to my MP on 9th March telling him exactly what I thought was required which turned out to be fairly prescient. I work in hospital management and have undergrad and postgraduate degrees in science with a healthy interest in epidemiology and had been following the virus since it was 'wuhan flu'.
I would have:
Closed the borders. Immediately. It turns out we're an island and actually have full control over who comes in and who goes out.
Made everyone returning from their fucking half term ski trips isolate in government facilities for 2 weeks, like the diamond princess passengers.
Attended the COBR meetings re the developing situation so I was fully appraised of the situation.
Had my top team of scientists/medical leaders on the phone twice a day every day from January to ensure I had the best advice.
Worn a mask and not Shaken hands with Covid patients. DICK.
Spent time sourcing local manufacturers to produce a reliable source of PPE and ensured that we had sufficient in hospitals from the start.
Bought up extra capacity for hospital beds in the private sector for covid stepdown to save sending old frail Covid + patients back to Fucking care homes
Prioritised test and trace.
Mandated masks for the general public, rather than saying the evidence was weak, and having to go back on myself later.
Sacked Cummings in May to make a clear and visible statement that the rules must be followed by all, and no one is above the law.
Invested in support for the poorest and most vulnerable in society, including in work and out of work benefits. The furlough was one aspect I approved of. I would have paid people to isolate.
Closed schools to reduce transmission. Kids can't get/spread Covid. What a load of bullshit. Yes, certain demographics are more at risk/more susceptible, but the idea that kids were somehow immune was always going to be a triumph of hope over reality.
I would have assumed closing the borders and test and trace would have surpressed but not completely eradicated the virus and would have planned for the second wave, which would be much reduced given the previous steps
I would have invested in training (online) a whole bunch of final year undergrads and recent grads as 'associate teachers' who would be equipped to deliver online learning to pupils from home
I would have massively incentivised staff with any medical/nurse training to join the NHS as reservists. I would have recruited and trained staff as care assistants to support the NHS and social care, and eventually to be involved in increased capacity for the vaccine roll out .
And if I hadn't done all of that and managed to suppress the virus in April, I would have at least listened to my advisors who recommended a fire break in September.