Thanks antichef and NickB.
I had no idea about 'High CIV' and all that as I'm a newbie with a specific purpose for joining (see my EK posts). You have enlightened me as I've now read the other threads. My commutes to Abuja have done the trick - surely the highest cost per mile and minute of any J flight? This would explain why my colleague with an apparently higher spend doesn't get into the CCR.
BF