Ahmed Hassan was jailed for life with a minimum term of 34 years at the Old Bailey for planting the Parsons Green Tube bomb.
Ron and Penny Jones said they were never warned that Iraqi asylum seeker Ahmed Hassan had admitted being "trained to kill" by militants.
Did Parsons Green bomber Ahmad Hassan slip through the net before he attacked the London Underground last year?
The Iraqi teenager was found guilty at the Old Bailey after a home-made bomb partially exploded Parsons Green Tube station in west London in September last year.
Parsons Green bomber Ahmed Hassan told jurors that he lied to officials about being kidnapped by IS so he could study in Britain.
CCTV footage released by the Metropolitan Police shows a fireball ripping through a Tube carriage after the Parsons Green bomb detonated.
Ann Stuart said her hands, face and mouth were left "scalded", her hair singed and eyes needed to be washed out.
Paul Moore convicted of attempted murder after revenge attack on Muslim mum and daughter after London bombings
The son of the foster couple who gave a home to the teenager accused of being the Parsons Green bomber speaks for the first time. Spencer, 45, says his family will feel a sense of betrayal and says they were forced out of their home by armed police after the bombing
A 17-year-old boy has become the sixth person arrested by detectives as they continue to investigate the Parsons Green terrorist attack.
One of the suspects in last week’s failed bomb plot in Parsons Green visited other refugees across Britain in the months before the attack. Yahyah Farroukh visited relatives in Scotland, as well as fellow Syrian refugees that were houses in Bute after arriving in the UK. The 21-year-old, who was arrested outside a chicken shop in Hounslow, west London, on Saturday night, posed for photos with his family in Renfrewshire before making the trip to Rothesay on Bute in January 2016.
Channel 4 News showed that an algorithm used by the online retail giant suggested purchasing chemical ingredients which are harmless on their own, but can be combined to make explosives, incendiary devices and pyrotechnics.
Yayyah Farroukh was seen outside the Aladdins Fried Chicken shop in Hounslow, West London, being pinned down by police at midnight on Saturday.
Just hours after a bucket bomb detonated on a packed Tube train in the latest terrorist attack to hit the UK, the Islamic State terror group reportedly claimed responsibility for the attack.
Police investigating the Parsons Green bombing have arrested a teenager on suspicion of a terror offence. Scotland Yard said Kent Police had detained the 18-year-old man in the port area of Dover on Saturday morning.
Police in Birmingham have arrested a suspected knifeman in a security operation in this afternoon. Footage of the dramatic incident showed officers removing what appeared to be a knife from the man’s body as he was sprawled on the ground. The incident came just hours after a terror attack on London Underground, where more than 20 people were injured in an explosion at Parsons Green station.