From last.fm:

∆ (pronounced Alt-J) was formed when Gwil Sainsbury (guitarist/bassist) , Joe Newman (guitar/vocals), Gus Unger-Hamilton (keyboards) and Thom Green (drums) met at Leeds, UK University in 2007. The band currently resides in Cambridge. Gus studied English Literature; the other three Fine Art. In their second year of studies, Joe showed Gwil a handful of his own songs inspired by his guitar-playing dad and hallucinogens, and the pair began recording in their dorm rooms with Gwil acting as producer on Garageband. Read more about Alt-J on Last.fm.