Download festival is one of the biggest festivals in the UK and the largest gathering of metalheads you might ever see, so we want to help you navigate its 900-acre grounds. This list contains our top 10 bands you won't want to miss from the top end of the bill (The main Apex and Opus stages). This list isn't just the headliners but the performances that we truly think you shouldn't miss, whether it's a band that has travelled from far or bands that rarely visit the UK, the a