As a so called TFR training officer on the Vulcan (many years ago!!) I have to confess (now!) that I had little faith in the system! Yes, it worked (up to a point) but, if it came to the crunch, I would have had some serious misgivings in it at night, IMC, at a few hundred feet and with a "bucket of sunshine" in the bomb bay! However, that was what we had in those days so we did our best, rightly or wrongly! (Sorry guys, for all the b**l that I passed on !!!
Bill