White dots on leaves

OK, I planted out some of my tomato plants last weekend and they're seemingly thriving (found some more flower heads on one I thought was struggling )

however, on some of the lower leaves on quite a few of the plants are little white marks, anyone have any idea what they are and if I need to do anything about it?

I haven't got a photo yet, theres no sign of them drooping or anything, almost like they got splashed with fine specks of paint

:confused:

 

It might be meldew, I had that prob a few years back and was told to increase ventilation. I did and cut the lower leaves off, it worked.

 

meldew? isn't that in my bathroom? :D

they're outside but they are all close together

 

Im not sure it sounds like disease. Could it be scorch where water droplets have magnified the sun and burned little bits of the leaf?