Anyone know why the leaves are discolouring, it is not a major problem, a few leaves on three plants, a couple have gone on to dry out,
Is it a problem?
It's not unusual for foliage to get a bit rough through the season. Good airflow round your plants will help to avoid pests and diseases etc, but that can sometimes be a bit of water getting onto leaves when watering, and sun causing it to scorch. If the plants are otherwise healthy, and they certainly look fine, it isn't anything to worry about.
Changeable weather can make it tricky to avoid foliage damage, even undercover - heat then cold, windy wet weather, too much sun then no sun. All part of the fun of growing toms