# Which party wins control of the most London borough councils

> Labour leads at 93%, runner-up 8% across 2 winner-take-all outcomes — refreshed 2 d ago.

URL: https://simplefunctions.dev/odds/which-party-wins-control-of-most-london-borough-councils
Updated: 2026-05-07T00:05:47.710Z
Category: politics
Status: active
Closes: 2026-05-07

## Headline

- Leader: Labour at 93%
- Runner-up: Green at 8%
- Outcomes: 2 (winner-take-all)
- Venue: Polymarket (2 contracts)
- 24h volume: $17K

## Bound contracts (2)

| Outcome | Price | 24h | Volume | Venue | Slug |
|---|---|---|---|---|---|
| Labour | 93¢ | +8pp | $7K | polymarket | /markets/which-party-wins-control-of-the-most-london-boroug-polymarket-0xfabf05229b86db10edcadc457293fb617b9bd693b425a20897cbeb0390cc2890 |
| Green | 8¢ | −7pp | $10K | polymarket | /markets/which-party-wins-control-of-the-most-london-boroug-polymarket-0xfe5a3c4baf17f0b0e72d76b88f147761c3a85ba80ab23af09d1f23529c4e40fb |

## 30-day trajectory

| Day | Labour | Green |
|---|---|---|
| 2026-04-26 | 77 | 8 |
| 2026-05-02 | 84 | 15 |
| 2026-05-08 | 94 | 7 |

_11 days of price history captured. Each row is the daily mean of intraday 5-min captures._

## What moved the line

- 2026-05-08 · Labour +8pp 86→94¢ · polymarket
- 2026-05-08 · Green −7pp 14→7¢ · polymarket
- 2026-05-06 · Labour +7pp 84→91¢ · polymarket
- 2026-05-06 · Green −5pp 14→9¢ · polymarket
- 2026-05-07 · Green +5pp 9→14¢ · polymarket

## Analysis

This probability represents the likelihood that the Labour Party will control more London borough councils than other parties following local elections. The 83% assessment reflects Labour's strong polling position and historical strength in London's urban areas, though it could shift based on local campaign dynamics and voter turnout patterns. The main drivers of this forecast are current voting intention surveys, local economic conditions, and historically consistent patterns of party performance across London's 32 boroughs. The primary resolution event is the May 2026 local election day, when all borough council seats will be contested and actual results will determine control. Shifts toward Conservative or Lib Dem gains in specific boroughs could lower Labour's probability, while continued strong performance in polls would reinforce it.

### Key factors

- Current national polling data showing Labour leads Conservatives by approximately 15-20 percentage points
- Borough-level demographic composition and historical voting patterns, with Labour traditionally strongest in inner London and urban areas
- Turnout rates in local elections relative to general elections, which significantly affect result distributions
- Performance of third parties (Liberal Democrats, Greens) in specific boroughs that could fragment non-Labour votes
- Local issues and borough-specific campaigns that may diverge from national political trends

## Methodology

Headline is the **leader's price**, not an arithmetic mean — averaging disjoint winner-take-all outcomes is meaningless. Per-outcome prices come from the venue's last-traded mid; cross-venue values are simple means across contracts on each venue.

## How to use this data

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