There are at least three groups named Spirit Level:
1) Folk/blues/psychedelic band from Swansea, Wales consisting of Tom Williams (guitar, vocals), John Mear (guitar, vocals), Simon Davies (bass) and Jack Patrick (drums, percussion). Their debut album, "Four Hours" was recorded and released in the summer of 2011.
2) A Perth-based ambient/drone/pop music duo comprising Rupert Thomas and Lyndon Blue.
2) Seminal British jazz quartet from Bristol, England featuring Tim Richards (piano), Paul Dunmall (tenor sax), Paul Anstey (bass) and Tony Orrell (drums).