Coulson arrives at Scottish police station for questioning
Andy Coulson has arrived at Govan Police Station in the south side of Glasgow.
Police now have 12 hours to question him before applying for a further 12 hour period, if it is deemed necessary.
Andy Coulson detained by police in perjury probe
Former News of the World editor Andy Coulson is being detained at a Scottish police station by officers investigating alleged perjury.
Profile: Andy Coulson
Profile of Andy Coulson, David Cameron's former Director of Communications and ex-Editor of News of the World.