Glenn was born on the 23rd April, 1947, in Barrow-in-Furness, Cumbria, England.
He attended Grammar school in that town, before taking up guitar, aged fifteen. Turning to the bass a year later, he left home and the local band scene and fled to the brighter city lights of Blackpool.
Glenn played with a number of Blackpool-based groups including "The Executives", a regular club band which played the hotels and clubs on a regular and almost professional basis.
He joined the John Evan's Smash Band in 1966 just before the point when the group was to attempt the brave move to seek full-time work in the south of England as a seven-piece Blues and Soul Band.
After the other band members called it a day (having endured two whole weeks in abysmal circumstances in Luton, Bedfordshire), Glenn and Ian Anderson decided to continue with Mick Abrahams and Clive Bunker, two semi-heroes of the local music scene, in the band which was to become, after various name changes, Jethro Tull in February, 1968.
"This Was", "Stand Up" and "Benefit" were to feature the personable and idiosyncratic style of Glenn Cornick during the next three years in which he played his important role in the early years of Tull.
Ever the party animal, Glenn grew apart from the other band members during 1970. This was a reflection, not of Glenn's social waywardness, but of the reclusive and insular nature of the other guys' rather private and atypical lifestyles.
Glenn was "invited to leave" by manager
Terry Ellis but given due support and encouragement to form his
own Chrysalis Records signed band "Wild Turkey" which
enjoyed some success with records and tours supporting, amongst
others, Jethro Tull.
Glenn is a frequent visitor to J.T. fan conventions
around the world. And, curiously, he is the only one of the early
Tulls to still look, a little anyway, like his original press photos.