Johnson's Conservatives keep 15-point lead over Labour - Opinium poll

British Prime Minister Boris Johnson has retained his 15-point lead over the opposition Labour Party less than a week before a national election, according to a poll by Opinium published on Saturday by The Observer newspaper.Johnson's Conservatives were on 46% and Labour on 31%, both unchanged from an Opinium poll published a week ago.Opinium, which polled 2,003 people between Dec. 4 and Dec. 6, found that 53% of voters thought Johnson would remain as prime minister and 55% believed Labour'