Model Controls
● LIVE MODEL
High = concentrated in coastal/post-industrial heartlands; Low = uniform national spread.
Average plurality required to win contested constituency seats.
The Stronghold Dilemma: High concentration preserves individual heartlands (e.g. Clacton) with massive surplus votes, but leaves 98% of seats just below plurality thresholds.
Constituency Grid Cartogram (650 Represented Units)
Seat Won
Clacton (Beacon)
Seat Lost
Seat Conversion vs National Vote Share Curve
Current: 18.5% → 5 SeatsElectoral Metrics
Projected Seats
5
0.8% of Parliament
Efficiency Index
0.28
Sub-parity ratio
Wasted Surplus
42.4%
Votes in safe seats
Near-Miss Seats
23
Within 5% of threshold
Key Regional Basins
| Constituency Sample | Type | Share | Status |
|---|
FPTP Conversion Law: A uniform 20% vote yields near-zero seats. Under winner-take-all, seat translation stays flat until the national average clears local plurality thresholds (~32-35%), triggering an exponential surge.