After Procol Harum disbanded in 1977, Wilson played on Frankie Miller's Double Trouble album in 1978, and was a member of Joe Cocker's touring band between 1979 and 1984.

In 1984 Wilson played briefly with Patrick Landreville, a former member of the 1960s cult band RHS, which included bandmates Bob Siebenberg (Supertramp), Scott Gorham (Thin Lizzy) and John Boutell (Beauregard Ajax).

Wilson's last recorded work was on the 1985 Gary Brooker solo album, Echoes in the Night, along with his former Procol Harum bandmates Keith Reid and Matthew Fisher, on tracks "Ghost Train", "The Long Goodbye" "Hear What You're Saying" and "Mr. Blue Day".

[6] Brooker and Reid had reformed the band and hoped to aid his recovery by sending "him the demo tapes we were making with a horrible drum machine on it because he hated that sort of thing".

[8] Wilson was the only stable member of Procol Harum besides vocalist / pianist Gary Brooker and lyricist Keith Reid during their commercial and artistic peak from 1967 to 1977.

[9][10] Live performances of the song "Power Failure", a track written to showcase his talents on the album Broken Barricades (1971) were filmed on a number of occasions.