What makes PH7 by Peter Hammill notable?

'PH7' is notable for its critical acclaim, particularly for tracks like 'Porton Down' that reflect on contemporary issues of the time. The album further solidified Hammill's reputation as a profound lyricist and pushed the boundaries of progressive rock, influencing many artists in the genre. When 'PH7' was released in January 1979, Peter Hammill was navigating a solo career following his time with Van der Graaf Generator. This album came after his more commercially successful works in the 1970s, showcasing a deeper exploration into personal and political themes as Hammill sought to carve out his identity apart from the band.