Judy Aileen Dyble (born 13 February 1949 in London) is a British singer, best known as the original vocalist with Fairport Convention from 1967 to 1968. The group recorded their first album with her, their repertoire at the time consisting largely of American singer-songwriter works plus a few originals. After Dyble's departure Fairport recruited Sandy Denny as her replacement and turned toward the folk-influenced rock for which they became better known.

After Fairport Convention, Dyble performed with Giles, Giles and Fripp, a group that would later become King Crimson. Later she was one half of the duo Trader Horne with Jackie McAuley, releasing one album, Morning Way in 1969. She also guested on The Incredible String Band's 1968 album The Hangman's Beautiful Daughter (on "The Minotaur’s Song") and on G.F. Fitz-Gerald's 1970 album "Mouseproof".

From 1973 onwards Dyble left the music business to work as a librarian, but has recently begun performing again, and released a new album, Enchanted Garden in 2004, followed by Spindle and The Whorl in 2006.

Judy released a single in January 2008 with northern band The Conspirators through London-based record label Transcend. The single, a double A-side, featuring Judy's vocals on a cover of Fairport Convention's song "One Sure Thing" and The Conspirators song "Take Me To Your Leader", reached no 7 in the Official UK Indie Charts.

An album produced and arranged by Tim Bowness (No-Man) and Alistair Murphy, who also collaborated on songs, was released in 2009

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