The Prime Minister, Boris Johnson said that more restrictions will be imposed after the Omicron variant was indentified in the UK.
Two cases of the Omicron variant – in Nottingham and Chelmsford – are linked and both people had recently been to southern Africa.
The new variant can be spread by people who are double vaccinated, he said.
He said that anyone arriving in the UK will be asked to take a PCR test for Covid-19 on the second day.
The Prime. Minister said that rules on face coverings will be tightened up in shops and public transport, with a review in three weeks.
The Health Secretary Sajid Javid will make an announcement on tibias during the week.