In reply to mypyrex:
> Hope your diagnoses are favourable.
Thanks. Yes, I think so. Seems I wrecked my throat and vocal cords with what it turns out was probably whooping cough (complicated with a bit of asthma, and then trying to do long multipitch routes at 8000ft) and the damaged epithelium was then being further inflamed by silent reflux (apparently quite common and poorly diagnosed). Cue a course of the appropriate antibiotic (clathiromycin), another interesting endoscopy experience and a 6-week course of a proton pump inhibitor and antacids. Seems to have done the trick, finally. Simples.
Hope your problem is resolved too.