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MI5 remembers: Armistice Day 2021

Published date: 11 Nov 2021

Today, MI5 will be joining people around the UK to remember the service and sacrifice of all those that have defended our freedoms and protected our way of life.

As we join the national two-minute silence, we will be paying tribute to members of the Armed Forces, and their families, from Britain and the Commonwealth, reflecting on the vital role played by the emergency services and remembering those that have lost their lives as a result of conflict or terrorism.

We will be holding a short Remembrance Day service in Thames House, our headquarters, with members of staff who are currently serving in the Armed Forces Reserves laying wreaths. The service will be broadcast digitally for our staff and, as we did last year, we have established a virtual ‘Wall of Remembrance’, for colleagues to pay their own personal tributes.

MI5 was active during both the First and Second World Wars, playing a key role in combating espionage, intercepting communications, and feeding back disinformation. This included double-cross operations in advance of the D-Day landings, which convinced the enemy that the landings would take place at Calais rather than Normandy. You can find out more about our work in support of the Allied effort in both World Wars here.


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Staff at MI5 have today joined people around the UK to remember the sacrifice of those who lost their lives protecting this country and its allies.

As the country mourns the death of Her Majesty The Queen, we reflect on the close relationship enjoyed between The Queen and MI5 during her long reign. 

The UK and US flags alongside each other in the entrance of Thames House

To pay our respects, MI5 is flying the UK and US flags together in the entrance of Thames House, our London HQ