Agreed, BA have had cadets and all was well. But BA have an excellent training department and also the cadets were of small numbers mixed in with DEP from civil and military. The current trend is to solely recruit cadets.
As I said, any statement regarding them as safe can only be made when a full,audit of ASR and QAR safety data confirms this. How many issues/incidents are put into the ongoing training to final line check or flight ops errors that are headed off by the experienced captains.
BA (BOAC/BEA) have been taking on
ab-initio cadets since 1960 when they set up their in-house training school at Hamble (Southampton). Later they contracted out to a select few commercial flying schools, and indeed they still do today. Other airlines also source cadets from these same flying schools. Will your "full audit" take long? I only ask because this has been going on for
55 years now!