Chub live in rivers, some canals and the odd stillwater. They sit under cover: bushes, rafts, bridges, and the far bank. They will take almost anything, which is why 'chub baits' is a long list, but they are not stupid. A shadow on the skyline and they're gone.
A chunk of bread flake, a bit of cheese paste, maggots, or a worm under a bush will catch more chub than a peg that looks like a match swim. Rivers: after 16 June. Close season still applies.
Habitat
Cover. Far-bank bushes, rafts, the tail of a pool, canal boat moorings, and any crease that brings food past a snag.
Seasonal behaviour
They feed all open season. Autumn and winter big-chub fishing is a British tradition. Summer likes early, late, and shade.
On the bank
They watch. They come out, take, and bolt for the snag. A slow, confident melt of the float is classic. Don't wave the landing net early.
Fish care
Big mouth, soft tissue. Unhook carefully. They don't need a carp sack. Support a big fish for a quick picture.
Feeding approach
A few free offerings into the hole, then the hookbait. Hemp can hold them. Don't send a pint of maggot under a bush and expect them to stay.
Common mistakes
Standing on the skyline. Casting onto their heads. Fishing open water because it looks 'nice'. Too much feed before the first fish.
What to change if it isn’t working
Spooked: rest the swim, or move. Tiny taps: they're there — smaller hook, wait. No interest: change bait before you change peg.