British Prime Minister Boris Johnson said on Wednesday the government had been forced to impose tougher Covid-19 restrictions on parts of England because of the "sheer pace" of the spread of a new variant of the virus.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline