Boris Johnson has admitted there are "many things we wished we had done differently" on the anniversary of lockdown.The Prime Minister said there are also "many things we wished we had known" about coronavirus.He made the remarks at a Downing Street briefing a year after the country first entered a national lockdown on March 23.Since then, the UK’s grim Covid-19 death toll has passed more than 125,000.Mr Johnson said: “I think in retrospect there are probably many things we wished we had known and many things we wished we had done differently at the time in retrospect.”The country was “fighting a novel disease in very different circumstances” than any previous government could have imagined, he added.He said the biggest “single false.