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Met arrest three men 'assisting Russian foreign intelligence'
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France issues 'survival manual' to prepare citizens for invasion
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Trump revokes Biden’s security clearance in act of revenge
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Royal Mail sale to Czech billionaire gets national security clearance
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Royal Mail takeover by Czech billionaire given go ahead
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Starmer tells Cabinet Government will deliver ‘innovation and reform’
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Briton accused of spying for Russia set for trial next year
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Ukraine army has ‘fruitful’ few days destroying Russian military posts
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Armed forces chief ‘pleased’ with Sudan evacuation effort
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How does the Government’s new emergency alert message system work?
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Capita seals deal to offload human resources businesses in latest division sale
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Taiwan says Chinese weather balloon was found on northern island
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Royal Mail group faces ‘no further action’ over potential security probe
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Ukraine denies killing Darya Dugina in car bomb
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Government to probe French billionaire’s BT stake over national security fears
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BBC wants to name dangerous MI5 source accused of ‘terrorising’ women
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BT takeover fears as French billionaire increases stake to 18%
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Former top mandarins voice fears over PM’s security advisor choice
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Comment: Cobham's armchair generals should stand at ease
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Novichok hit squad 'the Cleaners' believed to still have agent in UK
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Forget the debate on the economy, Brexit is a huge risk to security
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Our best defence must be to attack extremism at its roots
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Sharing intelligence is vital in preventing terrorist attacks
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Sebastian Coe: Amid talk of extremism, sport can play a crucial role
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It’s right to have soldiers on the streets but not in the long term
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Michael Burleigh: More armed men alone will not prevent terror attacks
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Get your break in counter terrorism… at Disney
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