?? I stand to be corrected but I think the tune on
http://mudcat.org/@displaysong.cfm?SongID=5197 is different from the one on YouTube mentioned above
From: Lighter - Date: 07 May 15 - 08:11 PM
MacColl performs "Scarborough Fair" with Peggy Seeger in 1957:
https://www.youtube.com/watch?v=E9bpUK1Lx0k

Has someone uploaded a different track?