Modelling covid-19: The accuracy of the official coronavirus predictions depend, it seems, on mathematical models. But how accurate are the models themselves?

FIVE HUNDRED thousand people could die in the UK during the Covid-19 outbreak. Then it's 250,000, then 20,000. Or even fewer if lots of us have already had the virus and we didn't know about it. We could be under lockdown for three weeks, six months, 12 months or even two years.