Another one.
When at Cottesmore on 115 Sqn, Argosy (70-72) looking at my logbook I see I did three trips up north doing race track orbits for a long time as a departure from our normal flight checking role. I think we had an idea what it was all about but as a Nav my job was just doing the normal routine. The AEOs down the back knew what was going off on a "need to know" basis. We were in 1 Group so an available resource for the job I expect. A bit different for us but I preferred flight checking jobs to Berlin, the Med, or Changi.