 He is also an active campaigner for the preservation of the London district known as Soho and its role in the enhancement of the performing arts.He is the founder of Save Soho, a coalition of performers including Stephen Fry and Benedict Cumberbatch, residents and politicians that came together out of concern for the future of Soho’s historic role as a national platform for the performing arts.Arnold is also a film composer and created original music for Iggy Pop in the 2016 feature film "Blood Orange".