Andrew Lloyd Webber, Original London Cast, John Thornton, & Bonnie Langford

When did Andrew Lloyd Webber, Original London Cast, John Thornton, & Bonnie Langford start making music?

Andrew Lloyd Webber, Original London Cast, John Thornton, & Bonnie Langford's first song Mungojerrie and Rumpelteazer released on Thu Jan 01 1970.