Many years ago, well more than 20, I was OC Handbrakes at a large base near Huntingdon and the A1. One of my "secondary" duties was NARO - Nuclear Accident Response. I had some officers and airmen allocated, some vehicles and a "mobile" telephone the size of my largest Oxford English Dictionary, which with its batteries, was in a large suitcase which was just about possible to lift. As I recall we only ever had one exercise, on the airfield, and it was more "talk" than action. Fortunately we were never called out, in my time anyway.