In the Brecon Beacons National Park in south Wales, people are up and about all through the night. Emily Knight finds out what they're up to. The Beacons are recognised as an International Dark Sky Reserve - one of two in Wales and only 17 in the world. With minimal light pollution, it's possible to see nature as it once was - before the background glow of electric lights got in the way. There's plenty more to be found - from moth-trappers to starling-spotters to astro-photographers, well-armed with scarves and flasks and head-torches, the dark quiet landscape is alive with activity - for those who know where to look
