Mid Sussex
South East · County constituency · Mid Sussex borough
About the Mid Sussex constituency
Mid Sussex is a county constituency in the South East, covering most or all of Mid Sussex. The sitting MP is Alison Bennett (Liberal Democrat), first elected in July 2024.
At the 2024 general election, the Liberal Democrats won Mid Sussex with 39.6% of the vote, ahead of the Conservatives on 27.1%, a majority of 6,662 votes. Turnout was 70.2%.
If a general election were held today, PollCheck's projection at the current seven-poll average has the Liberal Democrats on 41.1% and the Conservatives on 25.0% in Mid Sussex, a margin of 16.1 points. The projection updates automatically as new polls are added.
Demographically, Mid Sussex is closely divided in the 2016 EU referendum (an estimated 46.4% voted Leave in 2016). About 40.4% of residents hold a degree, 71.9% of homes are owner-occupied, and the seat has a median age of about 43 (2021 Census).
Across the last 5 general elections on record, the seat has been won by the Conservatives 4 times, the Liberal Democrats 1 time (earlier years may be on predecessor boundaries).
Who lives in Mid Sussex? Constituency demographics
From the 2021 Census and 2016 EU referendum estimates. Constituency-level data on 2024 boundaries.
How did Mid Sussex vote in 2024 and how would it vote now?
2024 vote shares from the HoC Library. Current projection is at the 7-poll average.
2024 general election
Current projection
Map of Mid Sussex
Switch between ward-level 2024 election winners and a demographic view. Ward winners are Britain Elects' / New Statesman modelled estimates with an average ~4pp margin of error per ward. The demographic view splits the seat into small neighbourhoods (around 1,500 residents each, from the 2021 Census). Hover any area for detail.
Mid Sussex within Mid Sussex
The Westminster constituency of Mid Sussex sits entirely within Mid Sussex Council. Local council elections are a separate ballot from Westminster general elections - Mid Sussex District Council was not itself in the 2026 election cycle, but the West Sussex County Council election was held on Thursday 7 May 2026; the county-division results covering this seat are shown below. The most recent district ward results are shown after them.
Council overlap
| Council | Share of seat |
|---|---|
| Mid Sussex | 100% |
West Sussex County Council election, Thursday 7 May 2026
The county council is a separate tier of local government from the district council and from Westminster. These are the results for the county divisions covering this seat; vote shares are computed from the declared per-candidate ballots.
| Division | Winner | Top 3 vote shares | Turnout |
|---|---|---|---|
| Burgess Hill East | LD | LD 39% Ref 24% Con 19% | 45.9% |
| Burgess Hill North | LD | LD 34% Ref 28% Con 22% | 45.2% |
| Cuckfield & Lucastes | LD | LD 45% Con 23% Ref 20% | 49.6% |
| Hassocks & Burgess Hill South | LD | LD 56% Ref 22% Con 10% | 53.4% |
| Haywards Heath East | LD | LD 44% Ref 24% Con 17% | 44.1% |
| Haywards Heath Town | LD | LD 42% Ref 20% Con 20% | 45.3% |
| Hurstpierpoint & Bolney | LD | LD 36% Ref 24% Con 24% | 49.3% |
| Lindfield & High Weald | LD | LD 39% Con 26% Ref 21% | 53.5% |
Most recent council ward results
Latest council winner per ward. Where the council held a May 2026 election, those results are shown; otherwise we show the most recent available ward result (via DCLEAPIL, 2014-2024), or, where the seat was uncontested at the last election, the current sitting councillor from OpenCouncilData. The "Shift since GE2024" column is only computed for May 2026 results - earlier council votes pre-date the GE, so no directional shift is shown.
| Ward | GE2024 winner | Latest council winner | Shift since GE2024 | Turnout |
|---|
Projection trajectory
PollCheck's projection for Mid Sussex at each of the last 60 GB polls. Hover the chart for the underlying poll details.
Who has won Mid Sussex at past general elections?
2024 result is on current boundaries. The 2019 row is the UK Parliament's notional recalculation onto the 2024 boundaries (directly comparable to 2024). The 2010, 2015 and 2017 rows are on the boundaries in force at the time and aren't directly comparable.
| Year | Result | MP | Lab | Con | LD | Majority | Turnout |
|---|---|---|---|---|---|---|---|
| 2010 | Con hold | Nicholas Soames | 6.6% | 50.7% | 37.5% | 7,402 | 72.4% |
| 2015 | Con hold | Nicholas Soames | 13.9% | 56.1% | 11.5% | 24,286 | 70.9%-1.5 |
| 2017 | Con hold | Nicholas Soames | 25.0% | 56.9% | 12.7% | 19,673 | 73.2%+2.3 |
| 2019notional | Conservative winner | Mims Davies 2019 MP, pre-review boundary | 18.0% | 51.3% | 25.5% | 13,665 | 73.3%+0.1 |
| 2024 | LD gain from Con | Alison Bennett | 17.6% | 27.1% | 39.6% | 6,662 | 70.2%-3.1 |
Earlier years are on pre-2024 boundaries; comparable results on the new boundary will be added when sourced.
Constituencies most like Mid Sussex
Five seats with similar demographic profiles to Mid Sussex. Politics shown for context.
- ↑Owner-occupied71.9 / 73.3vs 61.9
- ↑Graduate40.4 / 39.6vs 33.7
- ↓Social rent11.3 / 11.0vs 16.8
- ↑Owner-occupied71.9 / 72.5vs 61.9
- ↓Leave46.4 / 45.0vs 53.2
- ↑Graduate40.4 / 42.9vs 33.7
- ↑Owner-occupied71.9 / 75.2vs 61.9
- ↓Leave46.4 / 46.2vs 53.2
- ↓No quals11.3 / 10.5vs 18.0
- ↑Owner-occupied71.9 / 70.8vs 61.9
- ↓No quals11.3 / 11.9vs 18.0
- ↓Social rent11.3 / 11.7vs 16.8
- ↑Owner-occupied71.9 / 75.2vs 61.9
- ↓No quals11.3 / 11.6vs 18.0
- ↑Graduate40.4 / 43.1vs 33.7
What would change this seat?
Move the sliders to set national vote shares. The per-seat projection updates live. Reset returns to the current 7-poll average.
Related
Sources
- 2024 general election results · UK Parliament Election Results portal and House of Commons Library briefing CBP-10009.
- Notional 2019 results on 2024 boundaries · UK Parliament Election Results portal. Recalculated by Parliament; carries assumptions about how 2019 voters would have distributed across the redrawn boundaries.
- Historic general election results (2010-2017) · House of Commons Library historic results files (on the boundaries in force at the time).
- Ward-level GE2024 estimates · Britain Elects / New Statesman - article by Ben Walker, underlying spreadsheet. Modelled from constituency totals; average ~4pp per-ward MoE.
- May 2026 council ward results · Democracy Club via PollCheck's locals 2026 dataset.
- Earlier council ward results (2014-2024) · DCLEAPIL v1.0 (Jason Leman, drawing on Andrew Teale's LEAP dataset and Democracy Club).
- Demographics · ONS Census 2021 (England and Wales), aggregated to constituency level using the ONS LSOA21 -> PCON24 best-fit lookup.
- EU referendum 2016 estimates · Constituency-level Leave vote estimates (Hanretty 2017 method).
- MP details and Cabinet roles · UK Parliament Members API. MP photos are fetched live from the same source.
- Boundary geometry and lookups · ONS Open Geography Portal (PCON24 boundaries, LSOA21 boundaries, LSOA21-WD24-LAD24 best-fit lookup).
- Current projection and trajectory · PollCheck's demographic swingometer applied to the rolling 7-poll average from aggregated GB polls. Not a true MRP - vote-share movements are applied through per-constituency sensitivity multipliers derived from demographic regressions.
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