 Various other sets such as the B70 UHF carrier telephony relay, C11/R210 HF transmitter/receiver for Royal Signals use, and the Marconi transmitter D11 and its associated receiver, the R230 were commercial developments adopted as standard sets by the British services.Manufacture of the equipment was carried out by Plessey, E K Cole (EKCO), Mullard Equipment Ltd (MEL), Murphy Radio, The British Communications Corporation (BCC), Redifon and others.Despite being developed for re-equipping the post-war British army, the first delivery of Larkspur equipment went to Nigeria.