Support for British Prime Minister Boris Johnson's Conservative party has slipped behind the opposition Labour party to its lowest level since the 2019 national election, a poll showed, after announcing a tax rise to fund health and social care. The poll, conducted by YouGov for the Times newspaper, showed support for the Conservatives slump five points to 33%, with Labour up one point to 35%, ahead of Johnson's party for the first time since January. Johnson set out plans on Tuesday to raise taxes on workers, employers and some investors to try to fix a health and social care funding...