Tomato Leaves Curling

Hi on some of my plants some leaves are beginning to curl inwards , any help appreciated

Pic would help.

Wind damage

Herbicide drift

Pysillid bug

Tomato viruses

Are the curling leaves old leaves, new leaves, or all of the leaves? Are the leaves curling upward or downward? Are there any other abnormal symptoms such as yellowing or distorted leaves?

Leaves on the end of a branch, look very healthy and curling upward

What have you got them planted in? Garden soil or potting mix or anything where you have introduced a product made from recycled waste - like soil mix or suchlike? If that it the case then it could well be a hormonal spray used on lawns that has about a six month residual effect. People are not supposed to put grass clippings treated with things like Versatill into green waste situations for six months after treatment. But who, pray tell me, is going to know? And folk take advantage of that fact. They really don't care if it affects your tomatoes - not their problem.
But the redeeming factor about this (if this is the cause) is that it won't kill your tomato plant, or, in fact, inhibit fruiting. The only thing it will do is twist and contort your tomato foliage so that they don't look the best. And, eventually, the residual effect will be gone so no need to have to worry about changing soil. Of course, the same thing applies if it is your own compost, and you add grass clippings affected by these sprays. Always, always, read, and re-read instructions on chemicals very carefully.

thanks piquant it is a mix from Oderings here in chistchurc

Do you know if it comes from a re-cycling source? Is it bulk or bagged? Anything to go on on the bag? Might just pay you to advise Oderings of your suspicions - you can't really prove anything - it doesn't affect a lot of things but tomatoes seem particularly vulnerable.
Of course, we don't yet know if this is the cause, but if you go another week or two and they don't get any worse, I'll pretty much guarantee that is what it'll be.

That is interesting, as i had a simular problem with their potting mix 2 years ago and believed it was residual spray. I have since only purchased Daltons from Bunnings and not had any more problems, plus it is a lot less expensive.