Magna Carta is a progressive rock/folk rock group, originally formed in London in April 1969.  Their first concert was on 10 May 1969, by Chris Simpson (guitar, vocals), Lyell Tranter (guitar, vocals), and Glen Stuart (b. Alastair Urquhart, vocals).
 The trio released albums for Mercury Records and Vertigo Records, enjoying particular success with 1970's Seasons.
 Magna Carta (1969) was released as their debut album by Mercury, before their 1970 album, Seasons, reached number 55 on the UK Albums Chart, although thereafter Tranter returned to Australia. The album was produced by Gus Dudgeon, arranged by later successful producer Tony Visconti, and the session musicians included organist Rick Wakeman, drummer Barry Morgan, jazz double bassist Spike Heatley and others. In 1971, Magna Carta performed at the Royal Albert Hall with the Royal Philharmonic Orchestra. Davey Johnstone joined the line-up, recording Songs From Wasties Orchard (1971) and In Concert (1972) with the band, before leaving to work with Elton John, with whom he is still playing.
 Simpson and Stuart were then joined by Stan Gordon, recording and releasing Lord of the Ages (1973). Shortly afterwards, Graham Smith, who had played on the sessions for Songs From Wasties Orchard, replaced Gordon. This short-lived line-up, augmented by guest musicians, recorded Martin's Cafe in early 1974, but the album's release was delayed by a couple of years due to a dispute between the band's management and record company. The main duo was then joined by Tommy Hoy (ex-Natural Acoustic Band), before Stuart left to run a pet shop in Richmond, Surrey.
 Nigel Smith joined in time to help record 1975's Putting It Back Together. In 1977, Hoy's former bandmate in the Natural Acoustic Band, Robin Thyne joined the band, along with Lee Abbott. Soon afterwards, Pick Withers was added. Withers stayed only briefly, leaving to join Dire Straits. Amid much acrimony, Thyne and Hoy left in 1979 to form NovaKarta. Tom McConville appeared on the Live In Bergen release, before the line-up changed again to accommodate Al Fenn and George Norris.
 Between 1980 and 1982, Doug Morter was added to the line-up, together with a variety of drummers, including Paul Burgess. The 1981 release, Midnight Blue, contained "Highway To Spain". Norris, Burgess, and Morter all left, the latter moving on to the Albion Band. Chris Simpson's solo release, Listen To The Man, came out during this period and featured backing from Abbott, Linda Taylor, and Will Jackson. Between 1984 and 1986, Simpson and Taylor went to the Middle East to run a music club, before returning home to re-form Magna Carta. By 1986, the line-up now included, in addition to Simpson, Taylor, and Abbott; Gwyn Jones, John Carey, Paul Burgess, and Simon Carlton. In 1988, One To One was released on the Tembo label, Jones left the band the same year.
 In 1990, Simpson and Taylor married, and, with the semi-retirement of Lee Abbott, they continued to play as Magna Carta as a duo, as well as with a larger line-up for extensive touring.
 The 1992 Dutch release, Heartlands, was followed by a tour of the Netherlands. The duo continued to maintain a busy live schedule, and over the years toured many different countries. Several live albums appeared over the course of the decade, in addition to the reissue of the band's 1970s albums on CD.
 In 2001, Seasons In The Tide was released on the Gold Circle label, although the label went bankrupt soon afterwards. In 2002, the DVD Ticket To The Moon was released, recorded at the Dutch island of Texel in 2001. Later that year, Magna Carta supported Fairport Convention on their Dutch theatre tour.
 In 2006, Chris and Linda Simpson announced that their marriage was over.[citation needed]
 In 2007, Magna Carta had already decided that they would disband in 2009, mainly in recognition of the deterioration of the Simpsons' relationship. In late 2008 they embarked upon a "farewell tour" of the Netherlands.
 In early 2011, Midnight Blue was released in a double album package with the live album Live & Let Live. In September and October 2011, a new Magna Carta line up toured around 17 venues in the Netherlands. 
 After another tour in the Netherlands,[when?] the band returned to the studio to record a new album, The Fields of Eden (2015).
 In December 2019 they announced their final concert, after 50 years