This chapter discusses the ideology of Pan-Islamism to comprehend the contemporary usage of ummah in the diaspora context. It reflects on the concepts of community and ummah to bring out the distinction between qawm and ummah. I try to contextualize how Muslims in Britain employ these to project a collectivity. Nineteenth-century Pan-Islamism emerged as a reaction to colonial rule. The notion of ummah today is often invoked in the backdrop of Islamophobia and securitization that Muslims face. Moreover, it is used as a tool to make claims qua Muslims. This chapter elaborates on the interrelations amongst South Asian Muslims and the various protests that have taken place in recent years. This is to reflect on the crucial question of whether the notion of ummah led to a formation of the Muslim diaspora.