article_snippet: Islamic State murderer Jihadi John had links to the 2005 bomb plotters who tried to blow up London's tube system just weeks after the horrific July 7 attack which killed 52 people, it has been revealed.
article_snippet: Documents have revealed a key figure of his London-based terror cell talked to one of the terrorists on the day of the attempted tube bombing - the would be terrorist was later jailed for life over the horrific July 7 attack which killed 52 people.
article_snippet: It was revealed this week that he was a 'person of interest' to MI5 as a member of a cell known as The London Boys, which was set up to recruit and raise funds for Somalia-based terror group al Shabab.
article_snippet: MI5 was also aware of Emwazi for six years before MI5 appeared on a hostage video for the first time in August 2014.
article_snippet: And now, even more worryingly, MI5 has been revealed at least one member of MI5 network had a connection with the worst terrorist atrocity to take place on British soil.
article_snippet: The failed July 21 attacks came just two weeks after four men blew four men up on London's tubes and a bus, killing 52 people and injuring more than 700 in 2005.
article_snippet: Court documents seen by The Observer reveal a leading member of Emwazi's network had a phone conversation on the day of the attacks with Hussein Osman, who was later jailed for life for placing an explosive at Shepherd's Bush tube station.
article_snippet: Court documents seen by The Observer show that security services were aware that associates of the 12-strong west London terror group had joined the four July 21 bombers at a training camp in Cumbria a year before the attempted terror attack.
article_snippet: The Government's independent reviewer of terror legislation David Anderson admitted MI5 may have 'slipped up'.
article_snippet: Two of the men on these weakened orders – known only as BX and CC in the court documents – aided with money, a false identity and bogus travel documents by the London jihadi cell.
highlights_snippet: Mohammed Emwazi had links to the 2005 bomb plotters who tried to blow up the tube .
  
highlights_snippet: Failed attack was due to take place just two weeks after 21/7 bombing .
  
highlights_snippet: 52 people were killed and 700 injured in worst terror attack on British soil .
  
highlights_snippet: Court documents reveal key member of Mohammed Emwazi's watched terror cell spoke to one of the failed terrorists on the day of 21/7 bombing .
  