British Prime Minister Boris Johnson said on Friday he was remaining in isolation with a high temperature, and urged the public to continue with the social distancing measures set out by his government. In his address, the prime minister told Britons that they needed to stick to the rules on staying at home unless it was essential to go out, ahead of a weekend when good weather is forecast. Johnson announced a week ago that he had become unwell and would be self-isolating in his Downing Street residence.