India, Oct. 1 -- After months of low numbers of new cases and deaths, a new real-time study showed higher prevalence of the coronavirus across the UK, with Prime Minister Boris Johnson describing the situation as a "critical moment".

As of Wednesday evening, 7,108 new cases were reported across the UK - more than the daily peaks in April and May, prompting renewed concern and more restrictions in several areas, particularly in north England.

Facing criticism from Labour over the government's handling of the pandemic, Johnson implored people to follow guidelines, as they did earlier this year, when the virus was suppressed for months, before resurging in September.

Another national lockdown remains an option, he declared.

As government...