British Prime Minister Boris Johnson on Saturday wrote to Scottish National Party leader Nicola Sturgeon congratulating her on her election result and asking her to work together, Downing Street said. "I believe passionately that the interests of people across the UK and in particular the people of Scotland are best served when we work together," Johnson wrote to Sturgeon, whose SNP won a fourth term in the devolved parliament in Thursday's poll and is urging Johnson to allow a fresh independence referendum. am/jj