 Although the band has featured two very distinct and different vocalists, the core instrumental line-up of Steve Rothery (lead guitar, and the sole 'pre-Fish' original member), Pete Trewavas (bass), Mark Kelly (keyboards) and Ian Mosley (drums) has been unchanged since 1984.Their 1980s sound (with Fish on vocals) was guitar and keyboard-led neo-progressive rock.They have been described at their outset as "a bridge between punk and classic progressive rock".