Downing Street says Gordon Brown and the president of Pakistan have agreed to work together to address the common threat of terrorism.
Police are continuing to search 10 properties across the north-west of England in connection with an alleged planned terror attack.
Twelve men - 11 of them Pakistani and most of them students - are still being questioned over the alleged plot.
Daniel Sandford reports.
Gordon Brown clip from Frost Over the World, Al Jazeera English
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