What it is
Bread punch is canal fishing at its most thoughtful. You liquidise a loaf, pot or throw a small cloud, and fish a punch of bread — 2.5 to 7mm — on a fine hook at dead depth. Roach, especially, will take it when they will not look at maggot.
It is a pole method first, a waggler method second. Plumbing is not optional. The punch must be fresh, the feed must be a cloud not a carpet, and you must not strike at every liner from a boat. Winter is the classic time; it still works in coloured water year-round.
Small fish are the enemy of maggot on a hard canal. Punch is how you skip them.