The TFR may certainly have been a piece of General Dynamics kit but it was always referred to by the Ferranti name in engineering crew rooms. Perhaps one of our ex-air radar fairies can enlighten us as to why? I do remember there being many more radomes than radars, so just because an aircraft had a TFR radome on its nose didn't necessarily mean that it was TFR equipped - at least up until 1969 anyway.
"Fly-by-wire" Vulcans ha-har... The main reason for all the secrecy was that the RAF didn't want the true state of affairs to leak out. The 'V' force were using electronic equipment left over from the european bomber offensive that had seen active service in Lancaster's - much of the radar navigation kit bore serial numbers indicating 1940's manufacture. It did the business though, just as the Shackleton was unbeatable at sub-hunting against the P3 Orion. Its the quality of the crew that counts.
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Through difficulties to the cinema