Here's a clip of the late, great Sam Sherry singing "She's a lassie from Lancashire", in waltz time, and clogging to it during the song. The steps are now known as Sam Sherry's Waltz, and clog teams dance to them to this day.

Sam Sherry clogging

And here's a clip or two of the 5 Sherry Brothers doing their variety act, courtesy of British Path? Films - Sam's the one with the darker, wavy hair.

Sherry Brothers