Marillion
From Tardis Wiki, the free Doctor Who reference
Marillion were a band who were active in the 1980s.
In 1987, Richard Kilpatrick attended a concert by Marillion in which he witnessed the Ninth Doctor playing guitar in a session band for one of Marillion's support acts, frantically looking at one of the exits several times while he did so. Soon after this concert took place, Fish, a member of Marillion, left the band under mysterious circumstances.
In early 2005, Richard wrote about this encounter on the conspiracy website Doctor Who?. (PROSE: Have You Seen This Man?)
