The multi-agency exercise – called Exercise Crystal Peak – took place over two days and involved more than 200 people including emergency responders from blue-light services, specialist counter terrorism (CT) officers, partners from the London Resilience Forum, as well as volunteers playing the role of casualties. The exercise was not carried out in response to any specific threat or intelligence, but forms part of our regular CT testing and exercising programme. The exercise scenario involved an improvised explosive device detonating and injuring large numbers of people as they attended a fictional music concert at a stadium venue. Commander Ade Adelekan said: “Whilst the exercise was not designed with any specific threat in mind, sadly, previous attacks such as those we’ve seen in Manchester and Paris show that this kind of scenario at a busy entertainment venue is a real possibility. “Exercises like this test how our blue-light services respond to this type of incident, ensure the plans we have in place are fit for purpose, and identify where we might improve. They also give our officers and staff invaluable experience to respond in a live-play scenario under pressure with real sights, sounds and smells, so that they are in the best position to respond effectively should the worst ever happen for real.” The exercise scenario began on Saturday, 26 November and took place at a disused terminal building at Heathrow airport. The scenario itself was not related to the aviation setting, but the venue had been used for previous counter terrorism exercises and using it for this particular exercise allowed the emergency services the space and control to respond in as realistic a way as possible, without causing disruption to the public. Among the specialist police units that were taking part in the exercise were armed officers, explosives ‘EOD’ officers, dogs, and forensic teams. Officers from the British Transport Police and the City of London Police also took part. They were joined by responders from the London Ambulance Service and the London Fire Brigade, who supported the search, rescue, casualty management and recovery responses at the scene.

Day two of the exercise took place on Wednesday 30 November and focused on the strategic coordination between the various agencies involved as the scenario moved from the immediate response phase, to the longer-term recovery phase. Over the course of the exercise, functions including command and control, intelligence, firearms response, communications, and disaster victim identification were tested.

The exercise is the first major live-play exercise carried out by the Met since March 2022 when Lord Harris published his second report looking at London’s preparedness to respond to a terrorist attack. The report identified that significant progress had been made since the initial report in 2016, with further recommendations identified which are now subject to consideration and implementation. Commander Adelekan added: “The overall terrorism threat level in the UK remains at ‘substantial’. We know that we cannot afford to let up in our efforts to prevent or thwart terrorist attacks, and equally, to be fully prepared to respond should one happen. I am extremely grateful for the support Heathrow airport has given us by once again, allowing the use of their building.

“This work is vitally important for all of us, including the public, who have a really important role to play by remaining vigilant. Please do get in touch if you see or hear anything that doesn’t feel right. You won’t ruin anybody’s life by doing so, but you could just help save lives.”

Anyone who sees something suspicious should report it to police, in confidence, by calling 0800 789 321 or in an emergency, dialing 999. You can also report concerns online at gov.uk/act