A double-decker bus carrying secondary school pupils from the German town of Marburg north of Frankfurt had a serious accident on the way to England in the Sauerland region. According to the police, 27 pupils aged 14 and 15 were injured on Sunday, four of them seriously. They were taken to hospital, but the four children’s lives were not in danger, the police announced on Sunday. Five teachers who were accompanying the school trip and the bus driver were uninjured, a police spokesman said on Sunday. However, many were suffering from shock. The bus with a total of 73 people on board suddenly ov…