RE: HMS Glorious.
The primary cause of her loss was down to the fact that her CO was clinically insane and was hell bent on returning to Scapa to Courts Martial his Commander (air) for questioning his mental state. S & G were able to intercept due to breaking the RN cipher at the time. The whole episode was/is well covered up.
KMS was the WW1 imperial German navy prefix. In WW2 it was KM.