Wet Patches

Morning people.

I have just discovered another wet patch in the van, the first was spotted a month or so back in the middle of the rear end bathroom floor, we thought something had been spilled by the previous owner, every now & then it reappears.

Yesterday whilst fitting a new microswitch in bathroom it was still there but I noticed another patch just inside the main doorway by the footmat ?

There are no evident leaks from above and ive checked under the van and there are no holes.

Any advice would be much appreciated.

Cheers