So not quite sure what your point is then, Tankengine?
As you note, they never set out to claim any record, and as far as I can tell, they did actually go around the world.
I'm with I42 on this - having about 16 long days of flying Chipmunks xc in the US, i.e. with far better-equipped ATC facilities and airfields, never exceeding 2.25 hrs, I have no idea how they coped with legs extending at times to almost 5 hrs and on marginal food intake at times. After 2 hrs I'm ready to throw myself out the side.
Try it!