The predictable outcome from this morning's news that police had detained News of the World editor-turned-David Cameron aide Andy Coulson is in: Coulson has been arrested and charged with perjury.

 The Guardian's Severin Carrell and Patrick Wintour report that Police suspected that Coulson misrepresented what he knew about News investigator Glenn Mulcaire's illegal hacking activities, as we wrote this morning, noting then that anything that put "Coulson" and "hacking" back into headlines would be a big headache for Cameron even though Coulson left 10 Downing Street last year.