After May 7
No overall control. Green Party largest party
Council size: 63 seats · 63 up on May 7
Council · London borough
Lambeth
No overall control. Green Party largest party after May 7 2026. (Majority lost, previously Labour)
What happened on May 7
Seats won and overall control
Reform UK
0 of 63 seats
Won 0 on May 7 · had 0 before
Next election
May 2030
Whole council every 4 years (London cycle).
Post-May 7 composition
Every party's seat count on the new council
Pre-May-7 composition is the latest OCD snapshot of who held each seat; post is pre minus seats up plus actual winners.
How accurate was the model here?
Our 7 May 2026 forecast for Lambeth
Locked, sha256-witnessed forecast scored against the actual count. See the full national accuracy audit →
Our locked May 7 forecast
The pre-election prediction
This is the seats-on-the-ballot projection we published before polls opened, used here for accuracy comparison only.
All wards
Per-ward forecast vs actual
| Ward | Our top pick | Actual winner | Predicted share | Confidence |
|---|---|---|---|---|
| Brixton Acre Lane | Reform UK | Green Party | 31.0% | medium |
| Brixton North | Reform UK | Labour | 32.1% | medium |
| Brixton Rush Common | Labour | Green Party | 32.6% | medium |
| Brixton Windrush | Labour | Green Party | 35.0% | medium |
| Clapham Common & Abbeville | Labour | Lib Dem | 25.7% | medium |
| Clapham East | Labour | Labour | 31.6% | medium |
| Clapham Park | Labour | Labour | 33.8% | medium |
| Clapham Town | Labour | Labour | 28.5% | medium |
| Gipsy Hill | Green Party | Green Party | 37.6% | medium |
| Herne Hill & Loughborough Junction | Green Party | Green Party | 46.4% | medium |
| Kennington | Reform UK | Labour | 32.9% | medium |
| Knight's Hill | Labour | Green Party | 35.1% | medium |
| Myatt's Fields | Labour | Green Party | 32.1% | medium |
| Oval | Reform UK | Labour | 32.3% | medium |
| St Martin's | Labour | Labour | 29.5% | medium |
| Stockwell East | Labour | Lib Dem | 26.6% | medium |
| Stockwell West & Larkhall | Labour | Labour | 34.0% | medium |
| Streatham Common & Vale | Green Party | Labour | 28.7% | medium |
| Streatham Hill East | Labour | Green Party | 34.9% | medium |
| Streatham Hill West & Thornton | Lib Dem | Lib Dem | 29.5% | medium |
| Streatham St Leonard's | Green Party | Green Party | 32.9% | medium |
| Streatham Wells | Labour | Lib Dem | 26.5% | medium |
| Vauxhall | Labour | Green Party | 26.0% | medium |
| Waterloo & South Bank | Lib Dem | Labour | 23.4% | medium |
| West Dulwich | Labour | Green Party | 28.3% | medium |