Riding profile

Southampton Test

UK constituency — England · Urban · south east

The question

Southampton Test: a safe seat for Labour?

Current forecast

Labour

Safe

Probability
100%
Mean margin (pts)
5.6
P(close race)
0%

Projected vote share

Projection by party

  • Labour 29.6%
  • Reform UK 24.0%
  • Green 16.6%
  • Conservative 15.5%
  • Lib Dems 9.3%
  • Other 4.7%

Watch list

The tightest races

Smallest projected margin. Open one for the numbers.

  1. Birmingham ErdingtonReform UK60 %0.5 pt margin
  2. Derby NorthLabour62 %0.5 pt margin
  3. Middlesbrough and Thornaby EastReform UK62 %0.5 pt margin

In context

How this riding stacks up

Labour Reform UK Green Conservative
HereSouthampton Test 29.6%24.0%16.6%15.5%
National averageUnited Kingdom 21.8% +7.8 25.4% −1.3 10.8% +5.8 19.3% −3.8

Nationwide averages computed across the 650 riding-level projections (unweighted mean).

Editorial read

Southampton Test, an urban constituency in England, elected a member with Labour in the previous cycle, with a 26-point margin. The Vote-Scope model projects Labour ahead at 30% vote share, against 24% for Reform UK, and the probability of a close race is negligible.

Sitting member

Satvir Kaur

Sits with Labour

Since
2024-07-04
Parliament
59th

Previous election · 2024

Won by
Labour
Margin
26.1 pts
Margin shift vs current projection
-20.4 pts

Detailed result · UK 2024

Candidates and votes

Candidate Party Votes % Occupation
Satvir Kaur Elected Labour 15,945 44.5
Ben Burcombe-Filer Conservative 6,612 18.5
John Edwards Reform UK 5,261 14.7
Katherine Barbour Green 3,594 10.0
Thomas Gravatt Lib Dems 3,252 9.1
Wajahat Shaukat Other 775 2.2
Maggie Fricker Other 366 1.0

Demographics

Who lives here

Population
111,633
Median age
34
Employment rate
71.9%

Data source : ONS mid-2022 population + Jan 2026 labour market

Last model run
Cycle
uk_2029