Ian Stephenson's guitar was way, way down in the mix.
So much so that when Woman's Hour was going out live and I was doing something else I thought he hadn't turned up in the studio and omitted to mention him in the line-up of artists. (Sorry Ian!)
Listening to it again now on the replayer I'm picking out a gentle guitar line like a trickling of the burn water the piece represents, weaving in and out of the rushing torrents of the pipes, fiddle and melodeon.
It would be very hard to lay a vocal line over it as the timing is so complex, to represent the fluctuating, bubbling burn, and extremely difficult to sing. I'd hesitate to try it!