Although the biography that accompanies Mark Kelly’s Marathon claims that Mark Kelly has plotted this debut step away from the Marillion mothership “for over 30 years”, it’s misleading. Keyboardist Kelly toyed with a solo album inspired by Dante’s Inferno during the mid-1990s, even approaching an aspiring young musician called Steven Wilson with a view to collaborating together, but when he didn’t receive a reply the idea fizzled out.