The Old Grey Whistle Test Pan Alley phrase from years before. When they got the first pressing of a record they would play it to people they called the old greys – doormen in grey suits. Any song they could remember and whistle, having heard it just once or twice, had passed the old grey whistle test. On 23 February 2018, a one-off three hour special of The Old Grey Whistle Test was broadcast on BBC Four, hosted by Bob Harris to mark 30 years since the final episode aired. The show's focus on "serious" rock music, rather than chart hits covered on BBC1 by
The Alan Bown Set when Roden left the band. Robert Palmer joined and the vocals were re-recorded by him, before the album's UK release, although the Roden vocals were issued in the US (and has never been reissued). The band appeared on BBC TVs "Disco Two" (which became The Old Grey Whistle Test). In 1970 the band changed labels yet again, this time to Island Records. They recorded the album "Listen", but Palmer promptly left, being replaced by Gordon Neville, who re-recorded the vocals before the album was eventually released. The single "Pyramid" was released before Andy Brown replaced Haldane and Mel Collins joined