Dee ihe na-aga n'ihu maka paragraf a - Otu n'ime ụgbọelu mgbasa ozi nke BBC n'oge mbụ, MCR 1 (mkpịsị aka maka Mobile Control Room), bụ nke ụlọ ọrụ Marconi-EMI jikọtara ọnụ wee nyefee BBC n'oge iji gosipụta Coronation nke George VI na Elizabeth
na May 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.