I've moved this into "unidentified moths group 1" where it seems to have some companions, although I think there are several species there. Periallactis monostropha and Psudotheta syrtica are two prospects (I've tried Tachystola spp without success so far). Katarina, several of the sightings are yours and they look brown, I suspect because the photo picks up a brown background. Can you remember if they were mainly grey and white? Having some physical specimens would make the job much easier.
It's very hard to judge the colour. I try to remove the yellowy-brown tinge when I process photos so the colours should be relatively accurate. I will try to catch some moths for you but I may end up catching the wrong ones. I'm not very good at recognizing them. I'm trying to learn to identify at least some of them myself but I'm still quite hopeless at it.