If it was during the Orange sessions, then it was almost certainly members of Quiver and/or Brinsley Schwartz
Full personnel for the orange sessions according to Goeff Arnold's discography is
Al Stewart : vocal, guitars
Tim Renwick : electric guitar; Spanish guitar on "Songs out of Clay"
Cal Bachelor : Spanish guitar on "Songs out of Clay"
Tim Walker : Spanish guitar on "The News from Spain"
Brinsley Schwarz : 12-string guitar
Rick Wakeman : piano, organ
Bob Andrews : organ on "Night of the 4th of May"
Bruce Thomas : bass
Brian Odgers : bass
John Wilson : drums
Roger Pope : drums
Graham Hunt : drums
John Donelly : backing vocals on "Amsterdam"
Mick Welton : backing vocals on "Amsterdam"
Kevin Powers : backing vocals on "Amsterdam"
He also refers to a Melody Maker article of 18th December 1971 which mentions the Lyke Wake Dirge.
Have a look at
http://www.things.org/music/al_stewart/discography.htmlIncidentally The Young Tradition did a fine version of it, and Bill Cowley, founder of the Lyke Wake Walk quotes it in his 1959 book qoutes a version that he got from one Richard Blakeborough, presumably from his book: Wit, Character, Folklore, and Customs of the North Riding of Yorkshire, Henry Frowde: London, 1898