[6] Born and raised in Gallowgate, Glasgow, Scotland, Liz Thomson sang from a young age, and joined local beat group, Bobby Patrick's Big Six, before they moved to London in January 1962.
The group toured Germany and played clubs in Hamburg, before Thompson decided to start a solo career and returned to England.
In 1968, she recorded further solo singles, on the Major Minor label, and also released an album, According to St. John, produced by Mike Pasternak, alias Emperor Rosko.
St. John was also a background singer on many records, including T. Rex's Tanx (1973), Pink Floyd's The Dark Side of the Moon (1973), Rick Wakeman's The Six Wives of Henry VIII in the same year, the concept album The Butterfly Ball and the Grasshopper's Feast (1974), and Andy Fairweather Low's, La Booga Rooga (1975).
[13] Her other project work the following decade encompassed Vivian Stanshall, Kevin Coyne, John Cale, Daevid Allen, Tom Robinson and Whitesnake.