In fact, according to Wikipedia, "Sing" was written in 1988...
""Sing" was included on the Trainspotting soundtrack in 1996. The original version, "Sing (To Me)" was recorded as a demo in late 1988 under the band's former name- Seymour, and can only be heard on the ultra-rare Promo-only single which was released over a decade later in February 2000."
In fact, according to Wikipedia, "Sing" was written in 1988...
""Sing" was included on the Trainspotting soundtrack in 1996. The original version, "Sing (To Me)" was recorded as a demo in late 1988 under the band's former name- Seymour, and can only be heard on the ultra-rare Promo-only single which was released over a decade later in February 2000."