Broadchurch's composer is Icelandic multi-instrumentalist Ólafur Arnalds.
Broadchurch . Much of the tone of the series was inspired by the music of Ólafur Arnalds , who also composed the soundtrack for the programme . Ólafur Arnalds ( [ ˈouːlavʏr ˈarnals ] ; born 3 November 1986 ) is a BAFTA-winning multi-instrumentalist and producer from Mosfellsbær , Iceland .