Lonnie Donegan and His Skiffle Group were instrumental in the popularization of skiffle music in the UK during the 1950s and 60s. Donegan, known as the "King of Skiffle", combined traditional folk with blues and jazz elements, creating a unique and influential sound. His song "Rock Island Line" is recognized as a seminal skiffle track, reaching number eight in the UK Singles Chart. The group's distinctive style and Donegan's energetic performances have had a significant impact on British music, inspiring many future rock musicians.