Radical preacher Anjem Choudary, jailed for inviting support for the Islamic State group, has been released.
The cleric was sentenced in 2016 to five and a half years in prison.
He led an extremist network linked to violent jihadists, including one of the killers of soldier Lee Rigby in 2013.
Choudary, 51, has served less than half of his sentence and will complete the rest under strict supervision. Up to 25 measures to control him have been prepared, the BBC understands.