When you do,come back and post it here and it'll get sorted In the meantime, don't sweat it.
Hey dude I've just looked back over my plant and can't see the black spots anymore I'm wondering if they was just tiny bits of dirt that have now blown away. But I've been doing some more digging and wonder if yellow leaf septoria could be my problem? Any thoughts? Here's a link to what I've just read and the wet warm conditions it describes are very much like my greenhouse can get on a hot day http://www.growweedeasy.com/yellow-leaf-spot-leaf-septoria
Thank you