UK response to national security emergency tested in nationwide exercise

More than 120 members of policing, the Armed Forces and government took part in a national exercise to simulate their response to an extreme national security emergency.

Feb 11, 2025
By Paul Jacques

Taking place between February 5 and 7, Counter Terrorism Policing, the Home Office and Ministry of Defence planned and conducted a national exercise to test the response to a large-scale security incident, such as a terrorist attack.

The exercise – known as Octacine 2 – was part of the Government’s regular counter-terrorism efforts. The focus was to test the ability of police and military to work together in extreme circumstances, as well as familiarising personnel with different sites and participating in joint briefings.

Octacine 2 built on a previous, similar exercise and was designed to simulate the deployment of military personnel to support the Strategic Armed Policing Reserve.

Armed police officers were temporarily redeployed from their routine roles in order to respond to a major national security incident, protecting and reassuring the public in a time of heightened tension.

It simulated the response that would be deployed under Operation Temperer, a contingency plan drawn up in 2015 to provide military support to the police in extreme national emergency circumstances, such as surge support in response to a major domestic terrorist attack or threat. It covers all of Great Britain, and is directed by the National Police Chiefs’ Council Counter Terrorism Coordination Committee.

The exercise included a live-play exercise, when the Operation Temperer national mobilisation coordination centre was stood up and military and police personnel were deployed to 11 sites across Great Britain.

Security Minister Dan Jarvis said: “Exercises like Octacine 2 are vital to ensure that our armed forces and policing partners are able to work well together to protect the British public from ever present threats.

“I am grateful for their tireless and dedicated work in serving our country, and their ongoing preparation to perform those critical roles that keep us safe.

Minister for Armed Forces, Luke Pollard, said exercises such as this are “critically important to ensure we can respond to threats quickly and effectively”.

“The training, while routine, is crucial for the Armed Forces to support policing partners and respond effectively in case of a major incident. This routine exercise allows us to test coordination and teamwork with various partners while also providing a visible presence to reassure and protect the public in instances of high-risk and national security incidents.”

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