At least one person has died in the United Kingdom after contracting the Omicron variant of the coronavirus, Prime Minister Boris Johnson said, warning that the variant now accounted for 40% of infections in London. #BorisJohnson #Omicron #News #Reuters #COVID19 #Britain Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en