How to fix a tiled roof leak?

[Mickey362]

I currently have water trickling down the wall in my kitchen. It does not seem to get worse when it rains, in that it is still there when it is dry; it is like it pools somewhere, and then that collapses and there is a steady trickle down my wall. I have been up into the roof, and I can see where the insulation is wet, but I cannot squish my body into the corner to see where it may be coming from. I have also been up onto the roof, and there are no split tiles, that I can see.   I have no idea where to even begin to investigate. We had a paper type insulation put in and that is what is white in the images. The roof tiles, there is some dirt and palm fronds bits under the ones I stuck my hand under and there are perhaps 3mm to 5mm gaps between some of the tiles, which you can see in the photo. Gutters are clean, as I do them regulalry.Dark spot indicates water damage, I suspect.Some debris and dirt under some tiles.