The man arrested by counter terrorism police in Kensington has been released on bail while investigations continue.
The 61-year-old man was picked up by the Met’s Counter Terrorism Command on Monday (September 12).
He was questioned by officers on suspicion of possessing an article for a purpose connected with the commission, preparation or instigation of an act of terrorism contrary to Section 57 of the Terrorism Act 2000.
He was released on police bail on Tuesday (September 13) to a date in early November pending further inquiries.
Metropolitan Police also said the search of property in Kensington has been completed.
Earlier this month radical hate preacher Anjem Choudary, who rallied support ahead of the London 7/7 attacks, was jailed for five years.
He had been found guilty following a trial at the Old Bailey of inviting support for ISIS between June 29 2014 and March 6 2015.