Ron Kit imported all sorts of things and was certainly importing Zeus when I started in the mid early / mid 70's so perhaps earlier.
Ron Kit never made frames that I knew of, he had them imported or built for him and painted.
I saw Beryl Burton on a Ron Kit frame (don't ask me why he chose green) but pound to a penny it was made by Woodrup (who made Hugh Porter / Bantel) or similar.
Similarly we had frames built by "Jobbing builders" in the 60's at Cliff Pratt and we put our names on them (before my time)
Wonder if BCM stands for BOCAMA?
Shaun