Oh, by the way....the British Motor Corporation (BMC) was formed by the merger of the Austin Motor Company and the Nuffield Organisation (parent of the Morris car company, MG, Riley and Wolseley) in 1952. Then, the British Leyland Motor Corporation ("BLMC"), was formed in 1968. Ultimately it would become nationalised as British Leyland then known just as BL.
So, when the radios saying British Motor Corporation were made, BMC was already gone!