England as he warned of “extremely tough" months ahead in the race to roll out a vaccine quickly enough to control the coronavirus.From Thursday, three-quarters of the population of England will be placed in the top tier of lockdown measures after the new strain of the virus piled pressure on hospitals already stretched to capacity by the pandemic.“The hope of the vaccine and testing alone are not going to be enough for the next few weeks, and possibly longer," the prime minister said in a pooled TV interview. “It’s now in these very tough winter months that we really must keep focus, keep discipline."The spread of the new variant of the disease means more parts of England will be placed under toughest tier 4 restrictions, requiring the.