[2] Some of Lehan's uncles were members of the Grumbleweeds, which led to him beginning to learn to play guitar at the age of fourteen, with his early influences including Brian May, Eric Clapton and Ritchie Blackmore.
In 1987, while still in Deadline, he joined first-wave black metal band Lord Crucifier, after their relocation to Halifax, West Yorkshire from Italy, however Lehan was only a member for a few months.
[3] Lehan left Acid Reign in 1989 to form Cathedral with former Acid Reign member Garry Jennings, former Napalm Death vocalist Lee Dorrian, former Carcass roadie Mark Griffiths, as well as Andy Baker.
[4] In 2013, Lehan and former Acid Reign and Cathedral bandmate Mark Wharton formed the doom metal band Workshed.
[5] Workshed's debut self-titled album was released on 13 September 2019 through Rise Above Records.