Sorting through my boxes I came across 4 different monographs.
No.27 Jan 1960 The equipment of the BBC television film studios at Ealing
No.28 Feb 1960 Programme switching, control and monitoring in sound broadcasting.
No.69 Sept 1967 a survey of the development of television test cards used in the BBC
No.77 Mar 1969 The automatic control of sound-signal level in broadcasting studios
Some include interesting photos

Is there anyone interested?