British Prime Minister Boris Johnson has announced new measures to stop the spread of a new coronavirus variant Omicron. In a news conference, Mr Johnson said that anyone arriving in the UK will now be asked to take a PCR test and isolate until they receive a negative result.<br />''<br />''<span style="color: #222222;">The British PM said, those who come into contact with people testing positive for a suspected case of Omicron will have to self-isolate for 10 days. Now wearing face coverings in shops and on public transport will become compulsory. </span><br />