Intelligence that the Detroit plane bomb suspect tried to contact radical Islamists while a student in London was passed on by British authorities to the US, Downing Street has said.
The name of Umar Farouk Abdulmutallab was included in a dossier of people believed to have made attempts to deal with known extremists that was shared with American intelligence.
But he was not singled out as a particular risk, Gordon Brown's spokesman said, insisting that Abdulmutallab was not radicalised until after he left the UK in October 2008.
However, denying reports that the information had not been divulged, the Prime Minister's spokesman said: ''Clearly there was security information about this individual's activities and that was information that was shared with the US authorities.
''That is the key point.''