A fitness fanatic, chef and

KHURAM SHAZAD BUTT

A 27-year-old Pakistanborn British citizen who was known to police and MI5, and was the subject of a 2015 investigation.

He is alleged to have been an associate of jailed hate preacher Anjem Choudary and appeared in the 2016 Channel 4 Islamic extremist documentary The Jihadis Next Door.

The Jabir Bin Zayid Islamic Centre, where Butt occasionally worshipped, said he was once asked to leave “after interrupting a Friday sermon”.

Residents at a block of flats in Barking, east London where several arrests were made on Sunday - said Butt, known locally as “Abs” or “Abz”, had lived in the area for around three years.

The father of two young children was a keen gymgoer and weightlifter, neighbours said.

Butt worked out at the Ummah Fitness Centre in Ilford, where a message on the door said: “While Mr Butt did occasionally train here at UFC gym we do not know him well nor did we see anything of concern, we will of course help the police in any way we can.”

Transport for London (TFL) confirmed he worked for London Underground as a trainee customer services assistant for six months until he left in October.

Housewife Erica Gaspar-