Multiculturalism in the United Kingdom is defined as the coexistence of diverse cultures manifested in behaviors, assumptions, and communication styles. The UK population includes immigrants from India, Poland, Ireland, Pakistan, and Germany. While Christianity remains the largest religion, the Muslim population has grown and a quarter of UK residents now report no religion. Debate exists around whether multiculturalism has failed in the UK, as the prime minister has argued, or whether cities demonstrate cultural diversity through mixed communities and influences in arts and media. Polish immigration has increased the Polish-born population in the UK.