The Evolution of the Ahmadiyya Muslim Community in the UK, 1913-2003 is an empirical study of the establishment and development of the Ahmadi community in the UK over ninety years. So far research on Muslims in the UK has to a great extent been focused on Muslims of South Asian origin and Sunni Islam. This study broadens understanding of Muslims in the UK by considering a largely overlooked Muslim minority, the Ahmadiyya, who are an unorthodox reform movement in Islam, founded by Mirza Ghulam Ahmad as a response to the prevailing political, economic and social position of Muslims in Punjab at the end of the 19th century. The Ahmadiyya, being a missionaryoriented movement, began propagating their beliefs in the UK in 1913 and have since established themselves in 87 locations. This thesis explores the various ways in which the community has become established in the UK: how the acquisition and retaining of members has contributed to consolidating the community internally as a united entity; how the creation of Ahmadiyya physical space has contributed to establishing the community in British society in general as well as in specific localities; and how the maintenance of links to the worldwide Ahmadiyya movement has contributed to establishing the UK community as part of that worldwide phenomenon. It argues that although the establishment of the Ahmadiyya community had broad similarities with the general trends associated with the development of the overall Muslim community, there have been significant differences stemming from it being an extension of the worldwide Ahmadiyya movement situated in the UK context. Their sectarian beliefs, and consequent persecution, their missionary ethos, organisational structure, leadership arrangements, political processes, migratory patterns, the make-up of their membership and their links with the worldwide movement have shaped how the community has acquired members, maintained internal unity and established a permanent and visible physical presence in the country.