You never went through a show in the studio without at least one camera breaking down. In Studio A you have four cameras and a producer planning his show would start with four and with a bit of luck end with four but in between all four cameras would break down and be repaired by the engineers. And the camera cables were the thickness of a man’s arm - at least. And they had connectors and they broke down - regularly.
[One of] the early maintenance engineers who most of the time were repairing cables [was] Jimmy Redmond who later became the BBC’s chief engineer, Sir James no less - a lovely man - who, incidentally, was in the wartime film Western Approaches - the radio operator who is playing the radio operator in Western Approaches is Jimmy Redmond.