New U.K. mask rules start as Johnson under fire over parties

Tighter restrictions to curb the coronavirus came into force in Britain on Friday, as the government faced new allegations that officials flouted rules they had imposed on the nation with lockdown-breaking parties last Christmas.

Face masks are once again compulsory in indoor public spaces in England under the measures British Prime Minister Boris Johnson announced this week to slow the spread of the new omicron virus variant. Vaccination passes will be needed for nightclubs and large events starting next week, and residents will be told to work from home, if possible.

The emergence of Omicron, which is spreading quickly in Britain, has shaken the government's hopes Omicron spreads more quickly than the currently dominant delta variant and likely is more resistant to current vaccines. It is not yet clear whether it causes more severe, or milder, cases off COVID-19.

Along with the new restrictions, the British government is offering everyone 18 and up a third, booster dose of vaccine to try to slow the spread of the virus.

The return of restrictions is unwelcome for many, and revelations of apparent rule-breaking by government officials during tough lockdowns last winter have heightened opposition to the new measures.