There are odd times tench can be caught in winter but quite frankly life is too short for that.
Roach,perch pike and bream are a much better prospect.
Water clears to look like tap water in winter so lines and hooks in smaller sizes are the norm.
Trouble is after carp fishing any hook looks small.
Roach in stillwater you can drop down to 20s and 22s when it gets cold.
Light waggler. In clear shallow water a pole waiving over their heads is a no no.
Bread punch is good. I find mid day to dusk good.
Perch well documented for worm,prawn or fish live or dead uns.
A piece of worm fished over a very light sprinkling of chopped worm is good for bites from most things.
I know nothing much about bream
Chub are good on rivers. Don't ignore cheese and bread.
PS I have just noticed your Devon location. Being warming down there your season is obviously warmer longer than up here.