Peter Bellamy was certainly used to hearing harmonies, though I'm not sure he ever sang anything but lead with the YT.

I've been remarkably impressed recently with the way Brian Peters can accompany himself in F on a C/G anglo.

When I heard Bertram Levy, he seemed to be able to play in any key on his C/G - of course, his chordal work was fuller on the more direct keys, but he seemed to manage to keep the whole chromatic keyboard in his head, and use all of it. (These days I hear he's moved on to bandoneon - my brain is too small to handle all that!).

I get away with finding the right key for straightforward anglo accompaniments by generally carrying three - I used a G/D and a Bb/F for a long time, and finally added a C/G. So in that sense I would agree with the Captain that English can be more flexible. I started that way, but I'm now much more at home on the anglo, which I started playing when I got into morris.