American blues guitarist Joe Bonamassa & former Deep Purple organist Jon Lord spar on stage during the 2011 Sunflower Jam charity concert at London's Royal Albert Hall, as part of a performance of Bonamassa's solo track, "The Ballad of John Henry".
More information about the Sunflower Jam can be found at
http://www.thesunflowerjam.com/
"The Ballad of John Henry" is the title track of Bonamassa's 2009 studio album.
This performance was backed by the Sunflower Jam house band of Micky Moody (guitar, ex-Whitesnake), Murray Gould (guitar), Nick Fyffe (bass) & Jerry Brown (drums).