UK Prime Minister Boris Johnson has announced a new Tier Four of coronavirus restrictions for London and other parts of England to combat an alarming surge in new coronavirus cases linked to a new virulent strain. The planned relaxation of coronavirus rules for Christmas has been scrapped for a large part of southeast England, and cut to one day for rest of the region, Xinhua news agency quoted Johnson said at a virtual press conference at Downing Street on Saturday evening. From Sunday morning, London, the South East and East of England will move into Tier Four restrictions, which will be broadly similar to national restrictions introduced in England in November, he said.(IANS)