Thanks for uploading this clip. I am glad that the signalling control panel I helped rescue isn't quite as complex to operate as the one shown in this video though!
VSC at Clapham junction was a Disaster! Signalling points failures all the time. ASE was 'Wrong man for the job'had to be paid off,, replacement narcissistic told by Chairman BR Board that he was to be sacked in 6 months time unless failures dropped, bought in man from Swanley led a task force team reduced failures.