This chapter is a description of the migration and settlement patterns of Muslims in Britain, from the postwar period to present times. It offers a comprehensive discussion of the presence of Muslims from South Asia in Britain starting from lascars who settled in dockyards and seaports, to professionals who came through the voucher system as well as through chain migration. For a discussion of Muslim diaspora communities in Britain, it is important to acknowledge the diversity based on Islamic denominations which influence community formation. It sketches a detailed account of three Muslim communities in Britain having origins in the South Asian regions of India, Pakistan, and Bangladesh. The chapter also discusses how these three ethnic backgrounds built their communities in the UK. It points out not only how migration was from specific areas but also how settlement patterns reflect chain migration and particular ethnic group settlements. This chapter also takes account of the diversity among Muslims in London based on their school of thought or sect, including Deobandi, Barelwi, Ismaili, Khojas, Bohras, and Ahmadiyya, to give a comprehensive picture of Muslim communities in Britain.