This guide explains the analytical frameworks behind each map layer, drawing on academic research by Sobolewska & Ford (Brexitland, 2020) and Campbell & Heath ("Fuelling the Populist Divide", 2021). It helps readers move beyond surface-level demographic description toward a theoretically grounded understanding of why British politics looks the way it does.
The maps in this project are built on the thesis that the fundamental divide in contemporary British politics is not the traditional left–right economic axis, but a newer identity divide shaped by two long-running demographic transformations: the expansion of higher education and the growth of ethnic diversity through immigration.
These shifts have gradually produced three distinct groups in the electorate, each with different worldviews, different relationships to social change, and different political demands. The conflict between these groups — once mobilised by events like the EU referendum — produces the volatile, polarised politics that characterises modern Britain.
"Two demographic shifts have been gradually reshaping British society for many decades — educational expansion and ethnic diversification. Just one generation ago a majority of the British electorate were white voters with few or no educational qualifications."
University graduates who hold cosmopolitan values as a core commitment. They embrace diversity as a social good, support anti-racism norms, and reject ethnocentrism on principle.
Ethnic minority voters who align with conviction liberals on identity conflicts because they are themselves targets of ethnocentric hostility. Their opposition to nativism is strategic self-interest.
White voters with lower formal education who hold ethnocentric worldviews. They experience demographic change as decline and threat. Formerly dominant, now declining but locally concentrated.
The political power of this framework lies in understanding that identity conflicts become polarised because the stakes feel existential to all three groups. Identity conservatives perceive their communities and values as under threat; conviction liberals view ethnocentrism as morally unacceptable; necessity liberals face the material consequences of prejudice.
A key insight from Brexitland (drawing on Karen Stenner's work) is that ethnocentrism is a stable disposition whose political impact depends on perceived threat. Many identity conservatives hold ethnocentric views quietly without these translating into political action. Threat — from rapid demographic change, economic decline, or salient political events — activates latent ethnocentrism into voting behaviour.
This explains why the same demographics produce different outcomes at different times. The UKIP surge (2013–15), Brexit (2016), and Reform breakthrough (2024) are successive waves of threat activation among identity conservatives.
Shows the percentage of residents identifying as other than White British (Census 2021). High-diversity constituencies tend to be cosmopolitan strongholds; very low-diversity ones are where identity conservatives concentrate. The most volatile constituencies are often in the middle — where diversity is growing but identity conservatives remain numerous.
The proportion with a degree-level qualification (Level 4+). This is the single strongest predictor of Leave voting and Reform support (r = −0.86 with Leave) — more predictive than ethnic diversity (r = −0.41), income, or age. University education is the primary route through which conviction-liberal values are acquired.
The graduate share map reveals "Two Englands" — a highly educated, urban, cosmopolitan England in London, university towns, and prosperous suburbs, versus a less-educated, post-industrial England in coastal towns, former mining communities, and rural peripheries.
View Graduates map →Maps the change in ethnic diversity between 2011 and 2021 Censuses (England & Wales). Rapid diversity change is a key "threat signal" — not diversity per se but the perception that one's community is changing fast.
UK-harmonised Index of Multiple Deprivation (Abel, Payne & Barclay 2019), comparable across all four nations. Uses IMD score for full 649/650 coverage. Deprivation compounds identity-conservative structure: low education + low diversity + high deprivation creates a powerful sense of being "left behind".
Cosmopolitan core constituencies elect 55% female MPs vs just 19% in identity-conservative ones. This reflects party selection practices and the broader correlation between cosmopolitan values and support for gender diversity in representation.
The core Brexitland classification assigns each constituency to one of six types:
| Type | Characteristics | Political Tendency |
|---|---|---|
| Cosmopolitan Core | High graduates + high diversity | Urban, professional, strongly Remain. Labour/Green heartlands. |
| Graduate Cosmopolitan | Degree-dense, moderate diversity | University towns, affluent suburbs. Lib Dem/Labour competitive. |
| Necessity Liberal | High diversity, fewer graduates | Ethnic minority communities, inner suburbs. Labour strongholds. |
| Identity Conservative | Very low graduates, very white, high deprivation | Strongest Reform vote. Former UKIP/BXP territory. |
| Traditional Working Class | Low graduates, low diversity | Ex-industrial, post-mining. Leave heartlands, Red Wall. |
| Mixed / Transitional | No dominant pattern | Suburban, mid-range. Most electorally competitive. |
Creates a single continuous score by summing % graduates and % non-white residents, producing a spectrum from identity-liberal strongholds (diverse, educated, cosmopolitan) to identity-conservative ones (white, few graduates, traditional). The geographic polarisation is starkly visible: a liberal crescent of cities and university towns versus a conservative interior of small towns and post-industrial communities.
Classifies constituencies based on: (1) demographic structure for identity conservatism, (2) signs of perceived threat (rapid diversity change, deprivation), and (3) whether threat has translated into Reform mobilisation. Activated = structure + threat + Reform voting. Primed = structure + threat but lower mobilisation. Latent = structure without strong threat signals.
Two bivariate choropleth maps show two variables simultaneously, avoiding single-variable oversimplification:
Top-left (low education, high Reform) = identity-conservative heartlands. Bottom-right (high education, low Reform) = cosmopolitan heartlands. The strongest correlation in the dataset.
Top-left (white + high Reform) = nativist pressure zones. Bottom-right (diverse + low Reform) = cosmopolitan areas. Weaker than education, confirming education as the primary driver.
Labour's 400+ seats span identity-liberal bastions (urban, diverse, Remain) and identity-conservative heartlands (white, post-industrial, Leave, Reform-threatened). The party must bridge communities whose identity values directly conflict.
With 121 seats, Conservatives face a two-front war: Remain suburban seats vulnerable to Lib Dems and Leave heartland seats facing Reform insurgency. Any move to recapture one flank risks losing the other.
Mean volatility exceeds 22pp — the largest party-system upheaval in modern British electoral history. Concentrated in identity-conservative areas where ethnocentric politics have destabilised traditional loyalties.
Campbell & Heath (2021) show that attitudes to representation are ideological, not just egocentric. They identify two competing visions:
Supporters want diversity in legislatures — more women, minorities, young people. Held by 47% of voters but 80% of candidates. A large elite–mass gap.
Supporters want more local, working-class MPs and fewer ethnic minorities. Common among older, less-educated, male voters — identity conservatives. Very rare among political elites of all parties.
This gap exists within every party, not just between them. The political class is far more cosmopolitan than the electorate, helping explain why identity conservatives feel unrepresented and turn to insurgent parties.
"People who support cosmopolitan representation are positively inclined to support the increased representation of all under-represented groups. By contrast people who prefer nativist representation prioritize increasing the number of local working class MPs and want to see fewer Muslims and ethnic minorities."
| Dataset | Source | Coverage |
|---|---|---|
| Ethnic composition (2021) | ONS Census 2021 (LSOA → PCON 2024) | England & Wales (+Scotland/NI census) |
| Ethnic composition (2011) | ONS Census 2011 (PCON 2010 → 2024) | England & Wales |
| Education qualifications | ONS Census 2021 TS067 (LSOA → PCON) | England & Wales |
| Deprivation (IMD) | Abel, Payne & Barclay UK IMD 2019 | UK (649/650) |
| 2024 election results | House of Commons Library | All 650 constituencies |
| Notional 2019 results | Rallings & Thrasher / HoC Library | All 650 (2024 boundaries) |
| EU referendum estimates | Chris Hanretty estimates | England, Wales & Scotland |
| Constituency boundaries | ONS Open Geography Portal (July 2024) | All 650 |
| Government ministers | GOV.UK / Hansard (Feb 2026) | All ministerial posts |
| MP data | members-api.parliament.uk | All 650 MPs |
Historic data has been mapped to 2024 boundaries using ONS lookup tables and best-fit LSOA matching, introducing small approximation errors but preserving constituency-level analytical validity.