Four people have been arrested on suspicion of "failing to disclose information which might be of assistance in securing the apprehension, prosecution or conviction of a person involved in an act of terrorism".
Two men, aged 21 and 31, and a 25-year-old woman were arrested by counter-terrorism officers at two residential addresses in east London, and a 25-year-old man was arrested at a residential address in Lancashire, Scotland Yard said.
The arrests come after two brothers who were stopped by police in Dover appeared in court last month accused of travelling to a terrorist training camp in Syria.
More top news
The Marsh & Parsons poster - captioned "a charming period property with a modern extension" - soon prompted criticism.
The track will be demolished to make way for a housing development and a new Stadium for AFC Wimbledon.
Just four authorities (Hammersmith & Fulham, Hillingdon, Newham and the City of London) have chosen to freeze council tax altogether.