Booster jabs will be offered to everyone over 18 in England from this week, the PM has announced, as he declared an "Omicron emergency". "No one should be in any doubt, there is a tidal wave of Omicron coming," Boris Johnson said in a TV statement on Sunday evening. The target to offer a booster to all adults by the end of January will be brought forward by a month, he said. Some medical appointments may also be postponed to focus on boosters. Mr Johnson gave his update on Sunday evening - just hours after the UK's Covid alert level...