In terms of listening to and learning from Harry Cox, Stigweard, yes, I would be a starter, and I'll keep that CD in mind, thanks; but, in terms of others (e.g. Sam Larner, Joseph Taylor), I'm not, frankly.
To Don: I hadn't heard much in the way of your particular critique before (shoehorning and tempo too slow, instead), but I have heard most of what you said on technique and drills before. However, rather than go through scales, I prefer to play a line, sing a line, play a line (with my tenor-recorder/English flute). If nothing else, this has improved my ear a tad as, starting this year, I have begun to write music by mimicing my Chants/songs on this instrument (having learnt to read just the top-line melody a couple of years ago).