Here's another version of Stag that mentions the original Christmastime setting.
Ken Colyer (official wiki AMG) was a British jazz musician, one with a fondness for all traditional forms of music. Many people consider him the link between jazz and skiffle.
This is a lot slower than the other two skiffle versions of Stag I posted a few months back, but was recorded in 1956 as well. Lyrically, it's different, and has a nice funny battle between the prosecutor and Stag's own lawyer.