Thanks Nick, we had breakfast at Woodford Lodge, seems like half the England team were there too and advised the same, but I have a soft spot for Blagdon.
This is only my fourth season fly-fishing, so I'm not qualified to comment on whether either venue is in decline, but when was the weed last cut?
If the problem is due to agricultural run-off, maybe the farmers could find a use for hundreds of tons of biomass in exchange.
Jon, I'll be out one evening this week and will let you know nearer the weekend, might even be out on Saturday as well.