Mezue ahịrịokwu na-esonụ: Otu n'ime BBC si n'èzí Broadcast ugbo ala, MCR 1 (obere maka Mobile Control Room), e wuru site na nkwonkwo Marconi-EMI ụlọ ọrụ na-anapụta ndị BBC dị nnọọ na oge na-television na
Okpueze George nke Isii na Elizabeth na Mee 1937. MCR 2 bụ otu ihe ahụ dị ka MCR 1 ma nyefee ya n'oge okpomọkụ nke 1938. MCRs pụrụ ijide igwefoto atọ. Na mbido, ha bụ Emitrons ọkọlọtọ, mana emesiri mejupụta ya na Super Emitrons, nke rụrụ nke ọma karịa nke ọkọlọtọ na obere ọkụ. E wuru MCRs na chassis nke AEC Regal otu ụgbọ ala.