Okay Cluck Chuck.....I see what you're after!!!

Fretted Dulcimers are long zithers and Hammered Dulcimers are board zithers. I just want to throw that in as I meant to do so earlier.........

I think what you are seeing as "English Dulcimer" music are arrangements and such of English/Morris/Contra Dance tunes for fretted dulcimer. The tuning will vary depending on the song in question. If you aren't familiar with all the modal tunings, Jean's books and others have very in-depth descriptions plus you'll find probably a half dozen or so threads around here dealing with modal tuning.

As far as the instrument itself, it's the same thing. I don't know anyone who builds an "English" or "Church" or "Parlor" dulcimer and any use of those terms would be on an individual basis as Jean says, "a marketing ploy," and not as any known distinct classification of fretted dulcimer.

Spaw