There have been at least two artists using this name.
These are photos from concerts where Bellatrix played, so they may be of other bands that played the concert as well.
Reading Festival 2000 Aug 25 - 27, 2000 Reading, England, United Kingdom Uploaded by Paul Clarke
T In The Park 1999 Jul 10 - 11, 1999 Kinross, Scotland, United Kingdom Uploaded by Neil Lumsden