EMI 203 CCU to BBC special requirements
Here are two CCUs, both are painted gray at the BBC's request and the one on the right has a set of McMurdo connectors in place of the normal ones. The idea being that the "whole" CCU could be quickly changed if a fault developed. It would have plugged into a frame with the normal connectors on the rear.
Left CCU 213/3 serial No. 261. - Right CCU 213/1 serial No. 145, both are in a poor state.
It is not known if this is a BBC modification or if it was done by EMI. I have seen this multi plug arrangement done to a Marconi camera CCU.