Howard Marks clearly states in his autobiography Mr Nice (Secker and Warburg, 1996), that Lucifer was the solo work of Denys Irving.

He was married to the actress Merdelle Jordine (Crossroads (playing Trina MacDonald 41 episodes, 1978–1982), 'Timeslip' (1970 as Vera), Death May Be Your Santa Claus, Riddles of the Sphinx, The Sweeney) with whom he had a child.

In 2012 the English composer Simon Rackham released the track "Lucifer's Song" (A Passacaglia in Memory of Denys Irving).

Since the re-release of Big Gun by Dynamic, every mention of Lucifer seems to include the reference to it being the work of the "acid-ravaged mind of Peter 'Lucifer' Walker ex-The Purple Gang".

This unfounded attribution appears to come from the Rock Encyclopedia books by Vernon Joynson, but he gives no sources for his information, and Julian Cope also makes this error in his 2006 Head Heritage Exit LP review.