I can remember back in the early 70's when my Dad told me all about the Siege of Sydney Street, as when he went through his basic training in the Met at Peel House in early 1956, it was still very part of recruit training being only 40 years later, and obviously prior to the Braybrook Street shootings in Aug 1966.
I believe its still only one of the handful of occasions in 'modern times' when armed troops have been deployed in assistance of the Police on the streets of mainland UKoutside of wartime.