The NHS is at risk of being overwhelmed within three weeks in parts of the country, Britain’s four chief medical officers warned last night as hospital admissions overtook their first-wave peak. In a statement raising Britain’s Covid-19 alert level to five, Professor Chris Whitty and his counterparts in Scotland, Wales and Northern Ireland said that they were not confident that the service could handle a further sustained rise in cases. Analysis showed that Britain was on course for 100,000 deaths by early February as another record number of infections led to official warnings that “the lives of our friends and...