No.429 of 650 · approved, not built MP: Margaret Mullane (Labour) England

Dagenham and Rainham

Dagenham and Rainham has 8 MW of renewables running, enough for 6,900 homes over a year, and nothing large waiting in the planning queue. When the wires are too full to carry the power, Britain pays wind farms to switch off instead. No wind farm here is paid that way — almost all of it goes to wind farms in Scotland. That cost is shared across every bill in Britain, so households here pay for it too: about £92 a year per household, £3.9m across the constituency's 42,588 homes.

Not visible
here

7.9 MW of wind is running in this constituency, but it sits on the local network rather than the national grid — so if it is paid to switch off, no national record shows it. That is why this seat has no figure here: not because nothing happens, but because nobody publishes it. The £ figure for this seat is a floor, not a zero.

how we worked this out

0.9 MW

of clean power — all solar — approved and still not built, enough to supply a year's electricity to 300 homes. Approved at least two years ago; waiting on the grid, not on planning. That is 0.1× the renewable capacity actually running here.

1 project · planning database (REPD), July 2026 · how we worked this out

£3.9m

is what the grid gap costs this constituency's 42,588 households in a year between them — £92 each, about 51 days of one home's electricity.

The £92 per household is a national figure — identical in every GB seat. Only the seat total varies, with the number of households · NESO · how we worked this out

The waiting list

1 of 1 waiting projects · years since approval

Ceme Campus, Marsh Way - Solar PV Panels 0.9 MW

3.3 YRS

Every approved, unbuilt project

approved 24+ months ago, still not generating · planning database, July 2026

Site	Technology	Enough for	Capacity	Approved	Waiting
Ceme Campus, Marsh Way - Solar PV Panels	Solar Photovoltaics	300 homes	0.9 MW	2023-04	3.3 yrs

Plus 1 more approved within the last two years.

What this page does not show

Smaller wind farms on the local grid are also switched off; national data does not show it, so the £ figure here is a floor, not a zero. Offshore wind is counted nationally, never per seat. The planning database can run a quarter behind reality.

Electricity does not travel from a particular project to particular houses. Everything generated goes into the national grid and everyone draws from that shared pool, so "enough for X homes" is a way of sizing the electricity — not a claim that these homes would be powered by this site. Battery storage is counted separately from generation: it moves power in time rather than making it.

Planning statuses come from the government's planning database (REPD), which records what was decided and when, but not why. Where a project was refused we say so and name the authority; for the reasons, look up the planning reference on that council's own register. How to check any figure on this page →

Read the full method, including everything we cannot see →

What has Margaret Mullane said about the grid in Parliament? Search Hansard →

See the full league table Data (JSON)