A former GCHQ worker who attempted to murder a US spy in a terrorist attack because of a grudge against the Secret Services has been jailed for life. Joshua Bowles, 29, ambushed the woman outside a leisure centre in Cheltenham, stabbing her three times in a determined pursuit through the car park and into the reception area.The Old Bailey heard Bowles had plotted the attack after failing to secure a permanent job at GCHQ, the listening post for Britain’s intelligence community. He stalked the victim online, found out she was due to play netball on the evening of the attack, on March 9, and lay in wait while armed with two knives.