Fanny the all-girl rock band from the early 70s. Here performing "You're The One" from the album "Charity Ball" live on the BBC's The Old Grey Whistle Test [also known as OGWT].
7th December 1971
"They were extraordinary: They wrote everything, they played like motherf*ckers, they were just colossal and wonderful." -- David Bowie, Rolling Stone, 1999
https://fannyrocks.com/about-2/
http://www.metalmaidens.com/fanny.htm