We had more than a few come to TNT over the years, and they were consistently good. I remember one turgid winter's night an AA light twin, single crew, being chartered at the last minute to position some senior TNT crew from Stansted to Liege. The young guy's performance on that night in very high workload icing conditions earned him a job offer from the fleet Captain on landing!
AA have always been a good trainer of pilots, especially in the practical experience side of things.