DEWSBURY suicide bomber Mohammed Sidique Khan was the terror cell's ringleader.
Khan, who died in the Edgware Road blast, along with his six victims, is now acknowledged by police as the gang's boss.
It is believed he recruited the three other bombers at gyms he set up in Beeston, Leeds.
The 30-year-old, from Lees Holm in Thornhill Lees, is known to have received European Union grants of up to £4,000 to set up the gyms.
The first was at the Jamia Mosque in Hardy Street in 2000. But he later moved the operation to Lodge Lane - to the property where he made bombs.
Among the earliest intake at Khan's gym were bombers Shehzad Tanweer, then 17, and 13-year-old Hasib Hussain.
It is thought this is where fitness fanatic Germaine Lindsay, from Rawthorpe, met his fellow plotters.
Once Khan's students were deemed to be ready he arranged for them to visit Pakistan, where some are thought to have gone to militant training camps.
Leeds Council has confirmed there were two payments under an EU scheme to help struggling communities and areas.
It has also emerged Khan was not deemed to be a threat when MI5 ran checks on him last year. He was subject to a check after his name was mentioned in a separate investigation.
The decision meant Khan was not watched by intelligence officers.