that was in the 1990s before the government clamped down on illegal raves big time,you got vague instructions where it was, and spent hours driving looking for it while avoiding the old bill who knew it was going to happen. the directions were deliberately vague to fool them, the trick was to get at least 500 people together so they didnt have enough manpower to stop it, sometimes there were 5000 people dancing their nuts off in the middle of nowhere, sometimes the coppers got good info and had the riot squad waiting., they would impound the sound systems. they got too big in the end, 20,000 people descended on a quiet country field , it made the news, i remember my mates army truck was on the front page of the paper . gangsters from the city tried to move in and take over selling drugs, but got run out with hatchets. the government brought in special laws in the end , thay could impound vehicles and hit you with massive fines . good while it lasted though, then it went corporate and door nazis at indoor clubs wouldnt let you in cos yer shoes werent right, and charged 2 quid for a bottle of water.