Covid is making another resurgence across Britain, prompting scientists to repeat their calls for the return of face masks.
Hospital admissions for the virus are approaching a three-month high.
And leading experts fear the outbreak, which surveillance data suggests has left one in 40 in England infected, will continue to pick up pace in the coming weeks.
GP surgeries in parts of the country have already started cancelling appointments because the uptick has left them with ‘exceptionally low’ staff levels.
Professor Danny Altmann, an immunologist at Imperial College London, called the surge ‘definitely something to worry about’.