No I haven't Paddy, although from what you say it's not easy going!
Several years ago I read an excellent book chapter on the various Irish heathers, possibly in David Cabot's 'Ireland' in the New Naturalist series, but unfortunately can't find my copy just now to check.
Michael Viney's 'Ireland' published in the Smithsonian Natural History series is also very good I think (although doesn't cover heathers).