Home Secretary Theresa May, who faced intense scrutiny during her efforts to deport Abu Hamza, said she was pleased that that the cleric "has finally faced justice" after using "every opportunity, over many years, to frustrate and delay the extradition process".
"His conviction was facilitated by this government's tireless work to successfully remove him from the UK to face trial in October 2012," she added.
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Around one in four teachers said they were physically attacked at least once a week.
The Metropolitan Police admitted they were struggling for cell space due to the large amount of protesters arrested.
The suspects, aged 18 and 19, have been arrested under the Terrorism Act.