Jethro Tull are a British rock band formed in Blackpool, England, in 1967. Initially playing blues rock and jazz fusion, the band later developed their sound to incorporate elements of hard rock and folk to forge a progressive rock signature. The band is led by vocalist/flautist/guitarist Ian Anderson, and has featured a revolving door of lineups through the years which include significant members such as longtime guitarist Martin Barre, keyboardists John Evan, Dee Palmer, Peter-John Vettese and Andrew Giddings, drummers Clive Bunker, Barrie "Barriemore" Barlow and Doane Perry, and bassists Glenn Cornick, Jeffrey Hammond, John Glascock, Dave Pegg and Jonathan Noyce.