Delirious consists of Jon Thatcher (bass), Martin Smith (vocals, high strung, and electrics), Stewart Smith (drums and percussion), Stuart Garrard (electric guitars, slide, e-bow, and vocals), Tim Jupp (keyboards, hammond organ, and accordion).
Delirious? are an English Christian rock and worship band, featuring Martin Smith on vocals and guitar, Stuart Garrard (a.k.a. Stu G) on guitar and backing vocals, Jon Thatcher on bass guitar, Tim Jupp on keys and piano, and Stewart Smith on drums and percussion. Stu G is the only member not related to the others by blood or marriage. Martin, Stewart, and Tim are each married to one of Jon's three sisters.
The question mark is part of the official name. On their early albums, the final s before the question mark was rendered as a 5. Therefore, the band's name often appears as Deliriou5? in some circles. This was purely an artist's concept and wasn't reflective on the band's true name. The band's logo changed in 1999, and the glyph was replaced with a character that could be an s or a 5. It should be noted that the name has always been spelled as Delirious? in official, non-graphical literature. This is consistent with the band's record company ( Furious?) and publisher ( Curious?).
Delirious? began life as a worship band for a youth outreach event called "Cutting Edge", instigated by the Arun Community Church in Littlehampton, West Sussex, England. Popularity of these events increased, and the band also played at other "Cutting Edge" events along the South Coast, reaching as far as Southampton.
The music became well known in Christian circles, and demand grew for recordings. Four EPs were released under the "Cutting Edge" name before the group made the decision to turn professional and change their name to "Delirious?". By that time, they had already sold over 70,000 EPs by mail order.
Many of the band's most famous songs were written during this era, including "I Could Sing Of Your Love Forever", "The Happy Song", and "Lord You Have My Heart".