This aircraft is almost certainly a replica and I was told at the time that it was being used for filming in Spain. I had never satisfactorily identified it but thanks to John Murray, 38 years later it has been identified. It was a converted Caudron C.275 c/n 007 (F4012)F-WZBK (1). The one behind was Caudron C.275 c/n 006 (F4013), F-WZBJ