I'll second the jack frost birdsnest. I fish quite regularly on the Leeds and Liverpool canal and its my go-to fly for the pike in there. I've tried bigger stuff but no success so far.
I bet the 13lb er from Raygill went like a train little al!!!!! I've had lots of follows from big pike there but no takers yet apart from the jacks. On quiet evenings Bernard lets you fish for carp on the fly........ now thats amazing.

Rob