Boris Johnson urged the public to pull together and help each other through tough new push to beat lethal Covid-19.The First Minister and Prime Minister made separate televised address - with the same emotional appeal - as all four nations of the UK prepare new restrictions on ordinary life, expected to last six months.Sturgeon thanked Scots for months of effort to hammer down infections, but warned "the challenged is once again getting harder".In a short statement, she said: "I know that all of