Disquo Bleu Records was a DIY label. It managed one single issued in collaboration with Rough Trade.  Its first - and only? - release was a single by The Monochrome Set, 'He's Frank' (BL-1), which came out in December 1979.  The band's next single was on the Rough Trade label proper. Distributed By Rough Trade Records. Thanks to Robert Lyons For The Info.

79 Monochrome Set He's Frank (Slight Return) DISQUO BLEU BL  1