If you have a particular water in mind, you might be better off asking anglers on there rather than on here, because the answer is probably "It all depends".
At that tench place you and I have been to a couple of times, seafood goes down well in the warmest months, and mussels work well. But in the spring when it's warming up, or the autumn when it's cooling down, you'll catch more tench on small baits like maggot.
As for worms, tench will take them readily - but so will everything else. Once or twice I've gone for tench with chopped worm and worm hookbait, and been dismayed to see my expensive tench bait depleted by everything but..... little roach, skimmers, small perch, you name it.