Oliver asked me what sort of music Sigur Rós plays (we bought their Ba Ba Ti Ki Di Do in Reykjavik). I told him “maybe it’s called ‘electronica’ ” without much confidence. It seems perhaps that they actually play post-rock, described by Wikipedia as:

A genre of alternative rock characterized by the use of musical instruments commonly associated with rock music, but using rhythms, harmonies, melodies, timbre, and chord progressions that are not found in rock tradition. It is the use of ‘rock instrumentation’ for non-rock purposes.