He was questioned by officers from the Metropolitan Police's Anti-Terrorist Branch and charged Friday with possessing a document "likely to be useful to a person committing or preparing an act of terrorism."
He is scheduled to appear at Belmarsh Magistrates Court in London on Saturday.
A 38-year-old man, arrested with Abi-Ayad, has been released on bail and ordered to report to a central London police station in July. Police didn't name him and provided no further information about the arrests.