claim: The band that released the album, 24 Carat Purple, along with two other British bands, is referred to as the "unholy trinity of British hard rock and heavy metal in the early to mid-seventies". Their performance was featured in a 2011 studio compilation album at the BBC's Maida Vale Studios.
supporting_facts.key: BBC Sessions 1968–1970
supporting_facts.key: Deep Purple
supporting_facts.key: 24 Carat Purple