Coronavirus cases are surging among the over-fifties, according to government figures seen by the Telegraph. Senior officials have warned of “worrying” signs for higher risk groups, with Public Health England (PHE) data revealing that infections increased 92 per cent among those in their fifties last week, 72 per cent among sixty-somethings, and 44 per cent among those in their 80s. It came as Birmingham was ordered back into lockdown amid warnings that Covid-19 cases are now spiralling across the UK in a way last seen in March. Until Friday, it looked as if the rise in infections, driven principally by young adults, was not yet affecting the most vulnerable older groups. However, the new PHE figures appear to justify experts’ fears by showing recent increases in hospital admissions among people aged 60 and over. There was a 20 per cent increase in Covid-19-related admissions last week compared with the week before among those aged 60 to 75, a 72 per cent increase among 75 to 84-year-olds, and a 67 per cent increase among those aged 85 and over. A PHE source said this had not yet followed through to intensive care unit admissions, but added: “the great worry is that that is what’s coming next.” Overall, there were 1,635 new cases among people aged 50 and over in England last week, compared with 915 the previous seven days. Yvonne Doyle, PHE medical director, said 3,539 new Covid-19 cases were reported on Friday compared with 2,919 the day before.