With Richard Thompson, Simon Nicol, and Ashley Hutchings from Fairport Convention, guitarist Mark Griffiths, drummer Gerry Conway, pedal steel player Gordon Huntley, and keyboardists Dolly Collins and Roger Coulam, Ian Matthews (aka Iain Matthews) recorded his debut solo album, Matthews' Southern Comfort, whose sound was rooted in American country music and rockabilly, in 1969. This was his first significant experience as a songwriter, although the band also covered the likes of Neil Young and Ian and Sylvia. He followed it up by forming a working band using the name of his first album, Matthews Southern Comfort (without the apostrophe), then released subsequent albums Second Spring (1969) and Later That Same Year (1970).
The band went through several different line-ups and toured extensively for the next two years, to general critical acclaim. They had one commercial success: a 1970 cover version of "Woodstock" (written by Joni Mitchell) was a number one hit single in the UK Singles Chart. It experienced heavy airplay in Canada reaching No. 5, as well as peaking at No. 23 on the Billboard singles charts in the United States in 1971. Afterwards, Matthews split with Southern Comfort, who went on to release three albums of their own on Harvest Records.
In 1971, Matthews recorded two solo albums (If You Saw Thro' My Eyes & Tigers Will Survive), on Vertigo Records. Under the sponsorship of former Yardbird Paul Samwell-Smith, and surrounded by likeminded British semi-folkies (notably another ex-Fairporter, Richard Thompson), he formed Plainsong with Andy Roberts, previously of The Liverpool Scene. The band's line-up consisted of Matthews, Roberts, guitarist Dave Richards and American bassist Bob Ronga. They were signed by Elektra, who released one album by them before the band split up.
Matthews Southern Comfort were frequently played on Top Gear during their lifespan, both sessions and records by the band appearing in John Peel's playlists. But not only was Peel a supporter of the band, he may even have been responsible for its existence. In an interview with Mojo magazine, Ian Matthews, who had just been fired by Fairport Convention in 1969 after the band decided to concentrate on its version of British traditional folk music, is quoted as saying: "I told John Peel the part of Fairport I loved was where we would interpret contemporary American songwriters. He said, 'Well maybe you ought to develop that as something of your own.'" And indeed this was what Ian Matthews did, first with Matthews Southern Comfort, then with Plainsong, and during his solo career. From: https://peel.fandom.com/wiki/Matthews_Southern_Comfort
Matthews' Southern Comfort with Joni Mitchell