TRIPLE DISC SET OF EARLY BROADCASTS FROM THE MIGHTY JETHRO TULL Formed in Blackpool in 1967, Jethro Tull initially played blues rock and jazz fusion, but the band later developed their sound to incorporate elements of hard rock, folk and pop and went on to forge a progressive rock signature. Led by the charismatic vocalist, flautist and guitarist Ian Anderson, Tull have employed a revolving door of line-ups through the years, which included significant members such as long-time guitarist Martin Barre, keyboardists John Evans, Dee Palmer and Peter-John Vettese, drummers Clive Bunker, Barrie "Barriemore" Barlow and Doane Perry, and bassists Glenn Cornick, Jeffrey Hammond, John Glascock, and Dave Pegg. After achieving moderate recognition performing on the London club scene, the band released their debut album This Was in 1968. After a line-up change which saw original guitarist Mick Abrahams replaced by Martin Barre, the band released the folk-tinged blues record Stand Up (1969). Stand Up saw the band achieve their first commercial success, with the album reaching No. 1 in the UK, followed by regular tours of the UK and the US.