I had the privilege of looking through a friend's late father's log book a few years ago and some of the 'interesting' flights were well documented.
Freddie Prince had been an airman selected for pilot training in the 30s and by Sept '39 was commisioned and flying Hudsons with Coastal; 224 Sqn at Leuchars IIRC.
One entry showed the crew searching Norwegian fjords for the Altmark, which I believe was carrying as POWs, RN survivors of Graf Spee attacks, and another entry showed them searching for any survivors of HMS Glorious, the carrier that was carrying the Hurricanes of 46 Sqn which had flown on from Bardufoss.
In my short career as a Herc' nav most of the trips are self-explanatory though maybe readers of my log book after I'm gone will wonder why we went to places like Tan Son Nhut.