Imwe yemotokari dzeBBC dzekutanga dzeOutside Broadcast, MCR 1 (chidimbu cheMobile Control Room), yakavakwa nekambani yakabatana yeMarconi-EMI uye yakaendeswa kuBBC panguva chaiyo yekuratidzwa kweTerevhizheni yeCoronation yaGeorge VI naElizabeth
muna May 1937. MCR 2 yakanga yakafanana neMCR 1 uye yakaendeswa muzhizha ra1938. MaMCR aigona kubata makamera matatu. Pakutanga, dzaiva Emitrons dzenguva dzose, asi dzakazopiwa neSuper Emitrons, idzo dzakashanda zviri nani zvikuru kupfuura idzo dzenguva dzose muchiedza chakaderera. MaMCR akavakwa pachasi pebhazi reAEC Regal rimwe chete.