The High Court has reserved judgment on the extradition of radical cleric Abu Hamza until a later date.
His QC says that an MRI (magnetic resonance imaging) brain scan could establish that he is unfit to plead and should not be extradited to the United States to face trial on terrorism charges.
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A lamp in the tower which houses Big Ben is to be switched off for the first time in more than 70 years.
Sir Bruce entertained audiences for more than seven decades.
Work in the tower will also pause over the bank holiday weekend.