Huge Chevron Craft Over Welsh Town in UK/Wales.Putting chickens into sheds for evening, when myself and my colleague heard a loud humming noise above us. We looked up and saw a huge chevron shaped thing just moving real slowly towards the hills in a northerly direction. It was solid and black with four dim lights on each side which we yellow or white. It was huge and at least five times the size of a 747 jet. We estimated it was about 1500 feet up in altitude. We watched it disappear over the top of the hill out of site.