The 2021 UK Census reveals a historic shift in the religious landscape of England and Wales (Scotland and N. Ireland report separately but show similar trends):
Key Drivers: Generational change (younger cohorts far less religious), secularization, and immigration (which bolsters minority faiths but also brings non-religious people).
Note: The census question ("What is your religion?") is voluntary and measures self-identification, not necessarily practice or belief intensity. The trend indicates a continuing trajectory toward a pluralistic, majority non-Christian society in the near future.