The Crown Prosecution Service (CPS) has defended its decision not to charge Abid Naseer, a Pakistani man who was convicted of terror offences in the United States yesterday.
Naseer, 28, was found guilty of plotting to bomb a shopping centre in Manchester and the subway in New York City.
He was arrested in Manchester in 2009, and though police submitted a file to the CPS, it was deemed that there was not enough evidence to prosecute him.
"The evidence in our possession in relation to Abid Naseer which would have been admissible in a criminal court was very limited," a spokeswoman said.
"Crucially, there was no evidence of training, research or the purchasing of explosives.
"We had no evidence of an agreement between Abid Naseer and others which would have supported a charge of conspiracy in this country."
After a most unusual trial in Brooklyn, jurors now must decide whether Abid Naseer plotted to blow up a Manchester shopping centre.
Osama bin Laden was sent letters updating him of the progress of terror cells in the UK, New York and Copenhagen, a US court has heard.
A man charged with drawing up plans to carry out terror attacks in Manchester, New York and Copenhagen is due to go on trial in the US.