Former News of the World editor and PM’s former communications chief, Andy Coulson, has been detained by Strathclyde Police on suspicion of committing perjury at the trial of former MSP Tommy Sheridan in 2010. The 44-year-old was arrested by seven officers from Strathclyde Police at his home in the Dulwich area of London at 6.30 am and is being taken to Glasgow for questioning. “Officers from Strathclyde Police’s Operation Rubicon team detained a 44-year-old man…