Demographics of Iraq
97% of Iraqis follow Islam: 61% Shia and 34% Sunni. 1% of these describe themselves as "Just a Muslim". According to the CIA Factbook, Shias make up 60% of population, while Sunnis 35%. Christianity accounts for 5%, and the rest practice Mandaeism, Yazidism and other religions.
British Iraqis
According to the International Organization for Migration, ethnic Kurds are the most numerous ethnic group amongst Iraqis in the UK. There are also sizeable numbers of Arabs,Chaldeans, Assyrians as well as Iraqi Turkmen, Armenians, Mandeans and other ethnic groups, such as Iraqi Jews, Yezidi, Shabakis and Kawliya. In the UK, about 65-70% of people originating from Iraq are Kurdish (and 70% of those from Turkey and 15% of those from Iran are Kurds). According to the 2011 Census, Iraqi-born England and Wales residents most commonly give their ethnicity as Arab (39%), Any Other ethnic group (28%) and Asian (17%).