It was the success of this single and the lack of a need for expensive instruments or high levels of musicianship that set off the British skiffle craze. A few bands enjoyed chart success in the skiffle craze, including the Chas McDevitt Skiffle Group ("Freight Train"), Johnny Duncan and the Bluegrass Boys, and the Vipers, but the main impact of skiffle was as a grassroots amateur movement, particularly popular among working class males, who could cheaply buy, improvise, or build their own instruments and who have been seen as reacting against the drab austerity of post-war Britain. The craze probably reached its height with the broadcasting of the BBC TV programme "Six-Five Special" from 1957. It was the first British youth music programme, using a skiffle song as its title music and showcasing many skiffle acts.