Obviously a public inquiry can't take place now as the country's in crisis. But when the times comes, there must be accountability. Misconduct in a public office is a criminal offence. Although, keep an eye on whatever legislative changes sneak in next.
As for Dominic Cummings, he'll no doubt avoid any consequences for his 'advice'.
I truly hope the projections are an overestimate. But, given they were expecting 45 million people to be infected in the UK, it's not looking good.
I don't think you can reasonably conclude there is no case to answer if you read the Reuters article or at the very least compare the statistical evidence of how poorly we are doing compared to, well any country at all.
Scrutiny might actually be a life safer in all of this.