This profile represents six bands/artists with the name Flatline: (1) Flatline are/were a hardcore band from St. Albans, England. Featuring distinctive socio-political lyrics and a combination of 80s hardcore, modern guitars and unique vocals, the band are currently on hiatus. Guitarist Rich Williams has gone on to produce demos and albums for the likes of Gallows, Enter Shikari and Kid Cosmic. (2) Flatline is a Death Metal/Post Hardcore band from St.