What it is
Tench fishing is an approach, not a single rig. You are looking for bubbles, a line of lilies, a silt-bottomed bay, and a bite that is often a lift. Corn, maggot, worm and a small method or cage all catch. The fish care is part of the method: a mat, wet hands, and no squeezing of a slime-covered fish for a better photo.
They feed best at first light on many UK lakes, then again in the evening. A commercial tench is not the same as an estate-lake fish — the first will eat a method wafer, the second may want three grains of corn under a waggler two inches from the pads.
Most stillwaters stay open through the close season. Rivers do not. If the tench live in a river, wait until 16 June.