"Celtic Trap" (1984)
“Celtic Trap” is a working title that was developed for The Unforgettable Fire.
In 2003, the Rock and Roll Hall of Fame in Cleveland, OH celebrated U2 with an exhibit focusing on the band. As part of that exhibit, notebooks identified as being Brian Eno’s were on display. However, we believe these may have actually been notebooks kept by Daniel Lanois after reading his autobiography, Soul Mining.
Regardless of who wrote in the notebook that was on display, on one page pertaining to the album The Unforgettable Fire, a number of songs are documented. Some have information beyond just the title, but others are just listed with a name. “Celtic Trap” is listed on that page with nothing more than the title. As far as we are aware this is the only reference to that particular name over the years.
The song was not included on the 2009 release of a remastered The Unforgettable Fire album. It is entirely possible that “Celtic Trap” was released as “Bass Trap,” a song that appeared on the b-side to “The Unforgettable Fire” single. We do not however, have confirmation that these are the same songs.