When the blues boom hit Ireland, Henry became involved with the rougher side of music through the outfit that were to become “Eire Apparent” and managed by Chas Chandler. Following an untimely exit from the band, Henry nailed some of the finest mixes of traditional and rock through his work with the legendary Sweeney’s Men. It is widely thought that this line-up more or less invented the concept of “Folk-Rock”.

An encounter with a young Sheffield singer led to Henry’s first ‘brush with the big time’ as part of Joe Cocker’s Grease Band. Tours and albums quickly followed, resulting in an appearance at Woodstock with Cocker featuring a now legendary performance of “A Little Help From my Friends.”