Has your louvre window got these expertly-drilled holes in? Wondered where my leak was coming from, straight into the mains unit under the window...
Another bit of classic Devon design. I assume they're drain holes. Unfortunately, if the wind's blowing up the side of the van, they pee rainwater everywhere inside. Taken me ages to find where my puddle's coming from.
They were added in the hope that rust worms would use the holes instead of going via the panel seams and jacking points....