Question: The person that formed The Jeff Beck Group had been a guitarist in a group formed when? 

Context articles: Flash (Jeff Beck album)
Beck, Bogert &amp; Appice
Camouflage (Rod Stewart album)
Hummingbird (band)
Jeff Beck
Jeff Beck Group (album)
The Jeff Beck Group
Jeff Beck discography
Rough and Ready (album)
The Yardbirds

Flash is the fourth studio album by guitarist Jeff Beck, released in July 1985 through Epic Records.
 The album reached No. 39 on the U.S. "Billboard" 200 chart as well as reaching the top 60 in four other countries.
 Two singles also charted: the first being a reunion with singer Rod Stewart (from the Jeff Beck Group) for a cover of "People Get Ready" by The Impressions, which reached No. 5 on "Billboard"'s Mainstream Rock and No. 48 on the Hot 100, as well as the top 40 in four other countries.
 The second single, "Gets Us All in the End", reached No. 20 on Mainstream Rock.
 The instrumental "Escape" went on to win the award for Best Rock Instrumental Performance at the 1986 Grammys, which was to be Beck's first of many such awards.
Beck, Bogert & Appice were a hard rock supergroup and power trio formed by guitarist Jeff Beck and evolving from The Jeff Beck Group.
 The line up included bassist Tim Bogert and drummer Carmine Appice who were both previously in Vanilla Fudge and Cactus.
Camouflage is a studio album released by Rod Stewart on 18 June 1984 (see 1984 in music).
 It was Stewart's 13th studio album and was released on Warner Bros.
 Records (WEA 925 095-1).
 Three singles came from this album.
 They were "Infatuation", "Some Guys Have All the Luck", and a cover of the Free hit "All Right Now".
 The album marked a reunion of sorts between Stewart and Jeff Beck, who plays guitar on several tracks, as the two had been members of the influential 1960s group The Jeff Beck Group.
Hummingbird were a British rock band, formed in 1974 by Bobby Tench of The Jeff Beck Group and Streetwalkers fame.
 Hummingbird recorded three successful albums, released by A&M using Ian "Sammy" Samwell as their record producer.
 The original line up included members of the second Jeff Beck Group, vocalist and guitarist Bobby Tench, keyboardist Max Middleton, bassist Clive Chaman, drummer Conrad Isidore and second guitarist Bernie Holland.
 At the start of sessions for their first album they were joined by Jeff Beck for a brief period but he did not contribute to the album and left to work on his own project.
 After the first album Bernie Holland was replaced by guitarist Robert Ahwai and drummer Bernard "Pretty" Purdie replaced Isidore on the next two albums,vocalists Madeline Bell and Liza Strike were brought in to complement the band.
 They found success mainly in the United States, also in Europe and Japan.
Geoffrey Arnold "Jeff" Beck (born 24 June 1944) is an English rock guitarist.
 He is one of the three noted guitarists to have played with The Yardbirds (the other two being Eric Clapton and Jimmy Page).
 Beck also formed The Jeff Beck Group and Beck, Bogert & Appice.
Jeff Beck Group is the fourth studio album by The Jeff Beck Group and the second album with the line up of Jeff Beck, Bobby Tench, Clive Chaman, Max Middleton and Cozy Powell.
 The album was produced by Steve Cropper and often referred to as the "Orange Album", because of the orange which appears prominently at the top of the front cover.
The Jeff Beck Group was an English rock band formed in London in January 1967 by former The Yardbirds guitarist Jeff Beck.
 Their innovative approach to heavy-sounding blues and rhythm and blues was a major influence on popular music.
This is a select discography for Jeff Beck, the English rock guitarist who has played with numerous groups including The Yardbirds, The Jeff Beck Group, and Beck, Bogert & Appice.
Rough and Ready is the third album by The Jeff Beck Group and the first of two by the second Jeff Beck Group.
 Released in 1971, it featured more of a jazz, soul and R&B edge to counter Beck's lead guitar.
 As a songwriter, Beck contributed more pieces to "Rough and Ready" than he had before, or ever would again.
 Beck enlisted Bobby Tench as vocalist and it is also the first time keyboardist Max Middleton is heard.
 Other members of this line up are drummer Cozy Powell and bassist Clive Chaman.
The Yardbirds are an English rock band, formed in London in 1963.
 The band's core lineup featured vocalist and harmonica player Keith Relf, drummer Jim McCarty, rhythm guitarist/bassist Chris Dreja and bassist/producer Paul Samwell-Smith.
 They worked with several lead guitarists, launching the careers of Eric Clapton, Jimmy Page and Jeff Beck, all of whom ranked in the top five of "Rolling Stone" magazine's list of 100 greatest guitarists.
 The band had a string of hits throughout the mid-1960s, including "For Your Love", "Heart Full of Soul", "Shapes of Things" and "Over Under Sideways Down".