Who is the MP for Brentford and Isleworth?

Ruth Cadbury (Labour) is the MP for Brentford and Isleworth. They were first elected in May 2015.

Who won Brentford and Isleworth at the 2024 general election?

The 2024 general election in Brentford and Isleworth was won by Labour with 44.2% of the vote, ahead of Conservative on 22.5%.

Who is projected to win the next election in Brentford and Isleworth?

PollCheck's current projection has Labour on 31.2% and Conservative on 20.9% if a general election were held today. The projection updates as new polling is added.

What council is Brentford and Isleworth in?

Brentford and Isleworth crosses multiple council boundaries: Hounslow (91%), Richmond upon Thames (9%). Westminster constituencies and local councils are separate units.

What is the demographic profile of Brentford and Isleworth?

Brentford and Isleworth is in London. The seat is Remain-voting (Leave vote estimated at 43.3% in 2016). Around 44.9% of residents have a degree, a median age of 37, and 46.7% of homes are owner-occupied (Census 2021).

When was the last general election in Brentford and Isleworth?

The most recent general election was held on 4 July 2024. In Brentford and Isleworth, Labour won with 44.2% of the vote. The next general election must be held by August 2029.

Which parties have won Brentford and Isleworth in recent elections?

Recent general election winners in Brentford and Isleworth: 2010 Conservative, 2015 Labour, 2017 Labour, 2019 Labour, 2024 Labour.

Constituency profile

Brentford and Isleworth

London · Borough constituency

Sitting MP

Ruth Cadbury

Labour

First elected May 2015

Current PollCheck projection

Region & type

London

Borough constituency

Last 5 GE winners

CLLLL

Labour 4/5, Conservative 1/5

EU referendum 2016

43.3% Leave

UK average 51.9%; -8.6pp below mean

Current outlook

Labour +10.3pp

vs Conservative 20.9%

LondonRemain-leaningGraduate-heavyDiverse

Who lives in Brentford and Isleworth? Constituency demographics

From the 2021 Census and 2016 EU referendum estimates. Constituency-level data on 2024 boundaries.

Leave vote 2016

43.3%

UK average ~52%

Degree or above

44.9%

UK average ~34%

No qualifications

16.9%

UK average ~18%

Owner-occupied

46.7%

UK average ~63%

Renting (social + private)

50.8%

UK average ~36%

Median age

37.0

UK median ~40

Age 65+

14.7%

UK average ~19%

Age 18-34

33.5%

UK average ~28%

How did Brentford and Isleworth 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

Lab hold · majority 9,824 votes (21.7pp) · turnout 57.0%

Current projection

If a general election were held today, at current poll average

Map of Brentford and Isleworth

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.

Council layer (not Westminster)

Brentford and Isleworth within Hounslow and Richmond upon Thames

Brentford and Isleworth crosses multiple council boundaries: Hounslow (91%), Richmond upon Thames (9%). The figures below come from the council elections held on Thursday 7 May 2026 in each constituent council.

Council overlap

Council	Share of seat	Projection
Hounslow 61 LSOAs	91%	View projection ›
Richmond upon Thames 6 LSOAs	9%	View projection ›

Most recent council ward results

Latest council winner per ward. Where May 2026 elections happened, those are shown; otherwise the most recent year on the ward’s pre-2026 boundary (via DCLEAPIL, 2014-2024). 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.

Loading ward results...

Ward	GE2024 winner	Latest council winner	Shift since GE2024	Turnout

Projection trajectory

PollCheck's projection for Brentford and Isleworth at each of the last 60 GB polls. Hover the chart for the underlying poll details.

Who has won Brentford and Isleworth 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	Right (Ref/UKIP)	Green	Other	Majority	Turnout
2010	Con gain from Lab	Mary Macleod	33.6%	37.2%	23.7%	1.6% UKIP	1.5%	2.4%	1,958	64.4%
2015	Lab gain from Con	Ruth Cadbury	43.8%	42.9%	4.0%	5.6% UKIP	3.7%	-	465	67.8%
2017	Lab hold	Ruth Cadbury	57.4%	37.6%	5.0%	-	-	-	12,182	72.4%
2019notional	Labour winner	Ruth Cadbury 2019 MP, pre-review boundary	50.3%	28.3%	16.3%	-	3.0%	2.1%	11,369	67.6%
2024	Lab hold	Ruth Cadbury	44.2%	22.5%	8.5%	8.7% Ref	8.9%	7.1%	9,824	57.0%

Earlier years are on pre-2024 boundaries; comparable results on the new boundary will be added when sourced.

Constituencies most like Brentford and Isleworth

Five seats with similar demographic profiles to Brentford and Isleworth. Politics shown for context.

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.

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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