The British folk revival incorporates a number of movements for the collection, preservation and performance of traditional music in the United Kingdom and related territories and countries, which had origins as early as the 18th century. It is particularly associated with two movements, usually referred to as the first and second revivals, respectively in the late 19th to early 20th centuries and the mid-20th century. The first included increased interest in and study of traditional music, the second was a part of the birth of contemporary folk music. These had a profound impact on the development of British classical music and in the creation of a "national" or "pastoral school" and led to the creation of a sub-culture of folk clubs and folk festivals as well as influential subgenres including progressive folk music and electric folk.