Besides singing, Longdon played flute, keyboards, acoustic and electric 6 & 12 string guitars, bass, mandolin, lute, banjo, accordion, percussion, dulcimer, psaltry, vibraphone, theremin and glockenspiel.

[4] Longdon was one of those who auditioned as lead singer of rock band Genesis in 1996, following the departure of Phil Collins.

He auditioned during the making of Calling All Stations (1997), but the role was given to Scottish singer Ray Wilson.

He died on 20 November 2021, aged 56, in a Nottingham hospital, following a traumatic fall at his home early in the previous morning.

[3] Peter Jones of the band Tiger Moth Tales, with whom Longdon had occasionally worked on stage, included a tribute song to Longdon entitled "We'll Remember" on the band's 2023 album The Turning of the World.