Finding Fish - in canals
Derek's Fishing Pages
Memorable Fishing Trips
Returning to Fishing
Bait & Groundbait
Presents for Anglers
Canal fish are constrained
Locks tend to restrict shoals of fish within one pound for long periods so once you have found some good fish they won't go very far.
I was on a narrowboat a couple of months back and standing on the bow it was easy to spot the ripples made by large fish vacating the the track as we approached. If you have access to the bank it might be worth blagging a trip up one of the sections you fish and marking off the spots as you disturb them - maybe drop a nice big ball of groundbait in at the same time and come back at dusk or first light the next day.
Near every canal town there is the favourite duck feeding spot. There always seem to be a few fish around to mop up the bread the ducks miss. You might like to try the green crust trick there when the feeders are absent.
Unless stated otherwise: Everything in this site refers to fishing in the British Isles and similar northern European waters.