U2 , UB40 , Wreckless Eric, Judas Priest , The Milkshakes, Blur , Manic Street Preachers , Elvis Costello , The Wonderstuff, Skunk Anansie , The Stone Roses and The Honey Turtles.   In 2000, the venue celebrated its 30th anniversary by hosting a two-day music festival at nearby Dudley Castle . Robert Plant at