The Tangent is a Progressive Rock Band from Northern England. based around keyboards player, composer and idiosyncratic vocalist Andy Tillison Diskdrive. ... Welcome to the site of UK/EU Progressive Rock band The Tangent! The Tangent are a well-established and much loved band with nearly two decades of creative output and 11 studio albums behind them and plenty more planned for the future. Here you'll find info about the band and its operations, its music, lyrics, philosophies and convoluted history.