Birmingham: 43% White British today, projected under 15% by 2051

53% White British in 2011. 43% in 2021. The trajectory does not stop.

Census 2021. Birmingham. 42.9% White British. Down from 53.1% ten years earlier. The fastest decline of any English city over 500,000 people. Ten percentage points. One decade.

The numbers going forward:

Year	White British
2011	53.1%
2021	42.9%
2031	31.7%
2041	20.1%
2051	14.9%
2061	4.7%

Four things drive this.

Fertility. White British TFR nationally: 1.31 children per woman (ONS 2024 births data). Pakistani TFR: 2.52. Birmingham’s Pakistani population is 17%. That fertility gap compounds every year. Every cohort is less White British than the last.

Age structure. Birmingham’s White British population skews older. The younger cohorts are already majority non-White-British. In primary schools, White British pupils are a minority today. The demographic wave is already in the system.

White flight. White British residents leave Birmingham for Solihull, Worcestershire, Warwickshire at higher rates than other ethnic groups. Census 2021 migration data confirms this pattern. It is not new. It is accelerating.

International settlement. Birmingham is a major settlement city. 2.3% of the population arrived from outside the UK in the year before Census 2021. South Asian and African countries dominate.

The models agree on direction. The Hamilton-Perry model projects 14.9% White British by 2051, revised up from 10.7% when the model was recalibrated on 13 August 2026: the settings it used before were projecting change too fast. The cohort-component model, which assumes ethnic fertility rates converge partway to the national mean, projects a higher share still. The true outcome sits between them. Both agree Birmingham passed majority non-White-British years ago; the question is how fast it continues.

Religion. Birmingham’s Muslim population: 31.8% in 2021 (Census). Christian: 29.9%. Muslim already exceeds Christian. Hamilton-Perry religion projections suggest Muslim majority in the early 2040s. First major English city.

Birmingham is not the exception. It is the preview. Leicester, Luton, Slough: similar trajectories. Blackburn: projected minority White British by the late 2020s. The dynamics are national. Birmingham just gets there first.

Source: Census 2021 custom dataset (direct observations, 20 ethnic groups). Hamilton-Perry v8.0 single-year CCR model, SNPP-constrained, recalibrated on an out-of-sample test (MAE 1.56pp, bias +0.05pp). Census 2011 DC2101EW (observed, not proportionally split). The backcast score previously quoted here has been withdrawn; it measured the model’s own guardrails rather than its accuracy. See the methodology.