Kareem Dennis, better known by his stage name Lowkey, is a British rapper and activist from London. He first became known through a series of mixtapes he released before he was 18, before taking a hiatus from the music business. He would return in 2008, with appearances on BBC Radio and at various festivals and concerts including the BBC Electric Proms, Glastonbury, T In The Park and Oxegen in the buildup to his first solo album Dear Listener, as well as collaborating with other British musicians to form the supergroup Mongrel. He released his second solo album, Soundtrack to the Struggle, independently on in 2011.

Andy James Nicholson is an English musician, DJ, record producer, and photographer, best known as the original bassist of rock band Arctic Monkeys, which he left in 2006. In 2008, he founded Mongrel with Jon McClure of Reverend and The Makers. In 2009, he became the bassist for ex-Milburn frontman Joe Carnall's band The Book Club, but left later that year to join Reverend and The Makers. He is currently producing and performing in hip hop group Clubs & Spades with Maticmouth from Reverend Soundsystem.