[1] He was the leader of the 1970s London-based band Windsong, which featured Annie Lennox prior to her involvement with The Tourists and fame with the Eurythmics.
In the early 1980s he played guitar and sang in a folk/ragtime/blues duo in north Oxfordshire, England, with fiddler David Favis-Mortlock, performing as 'Mortlock and Underwood'.
[1] A strong interest in the cultural life of England at the time of Jane Austen led him to establish an Austen group[2] in Oxford,[3][4] and to team up with Gillian Tunley in an ensemble called 'Austentation',[5] since augmented by the addition of Angela Mayorga on guitar and voice, and other guests.
[6] Underwood studied lute in Oxford with Lynda Sayce and Edward FitzGibbon, and viol with Susanne Heinrich.
[1] He played lute, harpsichord and viola da gamba in Oxford-based Early Music consorts Westron Wynd and La Joysance.