Police stage mock Tunisia-style ‘marauding gun attack’ on streets of London

Armed police, the military, SAS and spies are staging a mock ‘marauding terrorist attack’ on the streets of London today to test how emergency services deal with a deadly atrocity in the wake of the ISIS killings in Tunisia.

In the biggest exercise of its kind ever staged, Operation Strong Tower is a ‘noisy and visible’ practice run for more than 1,000 Met police, armed forces, transport workers and Whitehall officials.

In extraordinary scenes, volunteers posing as members of the public have been see with bloody wounds and fake severed limbs being lifted on stretchers by the emergency services.

Deputy Assistant Commissioner Maxine de Brunner says the Met has never before put on an exercise of this magnitude and it was designed to be ‘very realistic’.

The dramatic public display of how the UK’s security services would respond to an extremist’s deadly assault comes as efforts continue to identify British holidaymakers killed by an ISIS gunman on Friday.