BOAC
Lets do it simply - one step at a time.
WHY DID THE AIRCRAFT CAPTAIN NOT HAVE THE REGIONAL QNH SET ON HIS ALTIMETER?
A simple question regarding something that is axiomatic for every Service Pilot who operates at low level.
Failure to comply with such a basic requirement during a passenger carrying transit flight in poor meteorological conditions is incomprehensible; unless he was preoccupied with listening to the Commercial Radio station selected on the ADF.