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Having been the target of a terrorist plot while previously an ambassador, the Deputy High Commissioner - a political analyst by training - understands the threat better than most.
His warning comes amidst reports of a consolidation of the Al Qaeda presence in Europe’s soft underbelly, US legislation imposing strict physical antiterrorism security standards on the US petrochemical industry and comments by Lord Stevens, the former Metropolitan Police Commissioner, that the number of Al Qaeda operatives and active supporters in the UK may be as high as 4,000 - twenty times higher than Lord Stevens' 2005 estimate.