We scientists said lock down. But UK politicians refused to listen | Helen Ward

For 11 fateful days in March, the government ignored the best coronavirus advice. It must learn from that mistake

• Helen Ward is professor of public health at Imperial College London
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In mid-February a colleague mentioned that for the first time in his life he was more concerned than his mother, who had been relatively blase about the risks of Covid-19. It felt odd for him to be telling her to take care. We are both professors in a department of infectious disease epidemiology, and we were worried.

Two months on, that anxiety has not gone, although it's also been joined by a sense of sadness. It's now clear that so many people have died, and so many more are desperately ill, simply because our politicians refused to listen to and act on advice. Scientists like us said lock down earlier; we said test, trace, isolate. But they decided they knew better.