I used to hear Martin and Redd at the Partisan, them and the boy - Long John Baldry. I even sang there one time, courtesy of Alex Campbell who I'd met earlier at another club the same night. I sang Jim MacLean's Maggy's Waddin, and Alex dragged me along to sing it at the Partisan, while Alex laughed like a drain and the audience mostly either didn't get it or did not approve. Martin and Redd featured in a BBC Four Folk Britannia that was rerun on TV a week ago.
My favourite song of Redd's and Matrin's was Sarie, with the immortal verse

Peeping through the knothole in grandma's wooden leg
Who will put the cat out when I'm gone?
You can ride a knitted bicycle down the High Street
Oh, a boy's best friend is his mother

Ewan