Leek Van Vlalen
Leek Van Vlalen (real name Sean A. Kelly, born c. 1961) was TISM's original guitarist, first joining the group in 1983 and performing with them until 1991. Before 1983, Jock Cheese performed all the guitar and bass parts.
In 2012, he embarked on a series of unplugged RealiTISM shows with his friend Kieran Butler, who sang the lead vocals while Kelly sang the backing vocals. He performed at the impromptu TISM reunion held for his 50th birthday, alongside Cheese, Eugene de la Hot Croix Bun and the original Les Miserables.