Question: Who besides Led Zeppelin has performed at Bath Festival of Blues and Progressive Music?
Context: The Bath Festival of Blues was a music festival held at the Bath Pavilion Recreational Ground in Bath, Somerset, England, on Saturday 28 June 1969.  It featured a lineup of British blues bands, including Fleetwood Mac (the headliners), John Mayall's Bluesbreakers, Ten Years After, Led Zeppelin, The Nice, Chicken Shack, Jon Hiseman's Colosseum, Mick Abrahams' Blodwyn Pig amongst others. The discography of the English rock band Led Zeppelin consists of nine studio albums, four live albums, nine compilation albums, 16 singles and eight music downloads. Formed in London in 1968, the group consisted of guitarist Jimmy Page, singer Robert Plant, bass player John Paul Jones, and drummer John Bonham.  The band pioneered the concept of album-oriented rock and often refused to release popular songs as singles.  Nevertheless, four of their ten songs that reached the Hot 100 had no mention of the title in the lyrics: "Immigrant Song", "Black Dog", "Over the Hills and Far Away", "D'yer Mak'er".  Their debut album, "Led Zeppelin" (1969), released by Atlantic Records, charted at number six on the UK Albums Chart and at number ten on the United States "Billboard" 200.  It received several sales certifications, including an 8 times multi-platinum from the Recording Industry Association of America (RIAA) and Diamond from the Music Canada.  Led Zeppelin's second studio album, "Led Zeppelin II", recorded when the band were on tour, was released a few months after the first.  It reached number one in several countries, including the UK and the US, where it was certified 12 times multi-platinum.  The album produced Led Zeppelin's most successful single, "Whole Lotta Love", which peaked at several music charts in the top 10. " Led Zeppelin III" (1970) was a softer, more folk-based effort compared to the hard rock of the band's previous releases.  It also peaked at number one in the UK and in the US. The Bath International Music Festival was held late each spring in Bath, South West England between 1948 and 2016.  The festival included many genres such as Jazz, Classical, World and Folk and merged with the Bath Literature Festival in 2017 to create a new multi-arts festival, The Bath Festival. The Bath Festival of Blues and Progressive Music was a counterculture era music festival held at the Royal Bath and West Showground in Shepton Mallet, Somerset, England on 27–29 June 1970.  Bands such as Pink Floyd and Led Zeppelin performed, and the festival was widely bootlegged.  An 'alternative festival' was staged in an adjoining field where the Pink Fairies, Yes, Genesis, and Hawkwind played on the back of a flatbed truck. Great Zeppelin: A Tribute to Led Zeppelin is a cover album released by the American hard rock band Great White in 1998, dedicated to songs of Led Zeppelin.  It was recorded live in a concert that took place at The Galaxy Theatre of Santa Ana, California, USA, in December 1996 and released by the French label Axe Killer.  The American edition was issued by Deadline Records in 1999.  Deadline Records also issued a very rare vinyl version of the album in 1999, omitting 4 tracks due to time limitations of vinyl.  Songs from this album appear on many compilations and also on re-issues of older albums as bonus tracks.  The album was re-issued in 2005 by the Canadian label Legacy, with the title Great White Salutes Led Zeppelin.  The entire album appears also on Great White's double-CD compilation "A Double Dose" issued by Deadline Music in 2005, along with the album of covers "Recover". Led Zeppelin were an English rock band formed in London in 1968.  The group consisted of guitarist Jimmy Page, singer Robert Plant, bassist and keyboardist John Paul Jones, and drummer John Bonham.  The band's heavy, guitar-driven sound has led them to be cited as one of the progenitors of heavy metal, though their unique style drew from a wide variety of influences, including blues, psychedelia, and folk music. Freddy Bannister (sometimes written as Freddie Bannister) was a leading UK concert promoter during the 1960s and 1970s, and was the founder of the Bath Festival of Blues 1969, the Bath Festival of Blues and Progressive Music 1970 and the Knebworth festivals. Led Zeppelin songs have been the subject of cover versions on occasion; American band Dread Zeppelin have made a career out of covering and parodying Zeppelin tunes.  However, other serious and authentic-sounding tribute bands have also emerged, striving to keep the true essence of a Led Zeppelin live show experience alive such as the Brazilian "Led Brazil" and Swan Song - A Tribute to Led Zeppelin, In the Light, and the British band Fred Zeppelin, who are based in the Black Country homeland of Plant and Bonham and have been seen by Robert Plant several times.  Lez Zeppelin is also an all-female tribute act, performing the work of Led Zeppelin. Led Zeppelin II is the eponymous second studio album by the English rock band Led Zeppelin, released on 22 October 1969 in the United States and on 31 October 1969 in the United Kingdom by Atlantic Records.  Recording sessions for the album took place at several locations in both the United Kingdom and North America from January to August 1969.  The album's production was credited to the band's lead guitarist and songwriter Jimmy Page, and it also served as Led Zeppelin's first album to utilise the recording techniques of the engineer Eddie Kramer.  Incorporating several elements of blues and folk music, "Led Zeppelin II" exhibited the band's evolving musical style of blues-derived material and their guitar riff-based sound.  It has been described as the band's heaviest album. Train Does Led Zeppelin II is a 2016 cover album by American rock band Train of Led Zeppelin songs.  This album covers "Led Zeppelin II" in its entirety.  The album was performed in concert and was released digitally as well as on compact disc and vinyl.  All profits from sales of the album will go to the San Francisco-based charity, Family House.  It is also the last album to feature founding member and lead guitarist Jimmy Stafford.
Answer: Pink Floyd