[MichelleC]

Is this anything to worry about? I've only just noticed them appearing. They look like a bit like water splashes. I've tried to look this up but it could be a number of different things. Leaf Miner, Onion Fly, Leaf Moth???

[Yorkie]

Are you sure it can't be water splashes?  Sun scorch on water droplets will cause this effect.

Otherwise, can you post a piccie?