Roach live almost everywhere: canals, rivers, drains, natural lakes and the silver-fish lakes on commercials. They shoal, they graze, and they will line up on a baited line if you feed with discipline.
The classic approaches still work: waggler or stick float with maggot and hemp, bread punch on a canal, or a light feeder with maggot and groundbait. Big roach often sit a little off the main shoal, or feed at last light when the small ones have had their fill.
Habitat
Canal far-shelf and lock cuttings. River crease, streamer weed and slacks. Stillwater drop-offs and the quieter end of a commercial silver lake. They like cover and a bit of depth.
Seasonal behaviour
Autumn and winter are the big-roach months on many venues. Summer roach are catchable but small fish often dominate. Hemp and tares in high summer can sort a better stamp. Rivers come alive after the 16 June start.
On the bank
A feeding shoal lifts and drops as one. If you're catching tiny fish, the bigger ones may be a yard further out or a foot deeper. Roach bites are often a dink, a hold-under, or a slow slide — strike too hard and you'll miss or bump.
Fish care
Wet hands. Don't ice them on a winter keepnet if you can avoid it. Big roach deserve a mat, not a squeeze in the grass.
Feeding approach
Little and often. A dozen maggots, a pinch of hemp, or a piece of punch. If small fish smear you, feed hemp and fish corn, caster or tares over it.
Common mistakes
Feeding too much, too fast. Fishing too heavy a float for shy canal fish. Striking at every tremble. Ignoring bread punch because maggots are 'easier'.
What to change if it isn’t working
Only tiny fish: change hookbait (corn, punch, hemp) and ease the feed. No bites: you're off the line or too heavy. Lifts: that's often a better fish — strike.