From his website:

Declan Gillgallon is a film composer based in Middlesbrough. Declan writes orchestral scores and mixes in synthetic elements that he creates from organic sounds. Declan began writing for Scyther Inc Podcasts. He scored the first season of X-Men: The Audio Drama and is currently working season 2. He recently scored Batman: The Long Halloween - The Audio Drama (Dir. Karl Dutton) and Broken Eden (Dir. Christopher Chucky), which is due to be released soon. Alongside scoring, Declan is working on a solo album called 'Beyond Consciousness', which will be released August 31st 2016. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.