Seth Bernard Lakeman is an English singer, songwriter and multi-instrumentalist, who is most often associated with the fiddle and tenor guitar, but also plays the viola and banjo. Nominated for the 2005 Mercury Music Prize, Lakeman has belonged to several musical ensembles, including one with his two brothers, fellow folk musicians Sam Lakeman and Sean Lakeman, but has most recently established himself as a solo act.

The tenor guitar or four-string guitar is a slightly smaller, four-string relative of the steel-string acoustic guitar or electric guitar. The instrument was initially developed in its acoustic form by Gibson and C.F. Martin so that players of the four-string tenor banjo could double on guitar.