After breakfast, we could hear the buzz again and having no actual firm plan for the day, started taking the board down. It unscrews easily enough, but being over 4 meters long needs two people to support and lift it down, ideally. No swarm emerged I am glad to say but the sight of wet wires was disconcerting. Some electrical buzz then. It had rained heavily. When the solar panels are replaced, improved roof seal is also planned. The trim has been put back in almost the same place, though I feel there is a mm or so gap at one end that wasn’t there before.