The former ambassador, now under arrest, has had plenty of ups and downs in his career of more than 40 years in the Labour party Peter Mandelson arrested on suspicion of misconduct in public office The former ambassador, now under arrest, has had plenty of ups and downs in his career of more than 40 years in the Labour party Peter Mandelson arrested on suspicion of misconduct in public office After a four-decade career that included some of the top jobs in politics, Peter Mandelson has