Oriel Chambers

The 5-story Oriel CHambers in Liverpool by the little know architect Peter Ellis was the first British building with a metal frame and a curtain wall of enlarged glass oriel windows. 

Ignacio Fernádex Solla. “Is Oriel Chambers the First Curtain Wall Ever?” Façades Confidential. June 2013. https://facadesconfidential.blogspot.com/2013/06/is-first-first-curtain-wall-in-liverpool.html