Fished Waulkmill today , took me a while to find out what they were on , they were taking flies off the surface but being very selectivee.
Actually it was the old boy fishing next to me who sussed it , he put on an dry Iron Blue Dun 16# and had a couple so I followed suit.
Only frustration today was the amount of break off's I had, I'm sure I'm like everyone else and hate it when this happens.
I use a figure of 8 knot for the droppers , have done this for years , Berlin (Carl Hutchison) did a step by step on the fly Fishing forum years ago.
Don't know whay suddenly I was getting snapped off at the dropper knot
no excuse but some of the fish today were so powerful I just had to let them run.
Maybe I'll change my tippet material and go back to a water knot.
Jim