British railways · measured, not guessed
Cathedrals of steam, reborn in sun.
Brunel and Barlow built these roofs to catch light. We measured how much of it each one could still turn into power.
Here's the honest twist: the most beautiful roofs are the worst solar hosts. The famous glazed arched sheds are listed heritage glass — glorious to stand under, useless for panels. The roofs that could actually generate are the plain modern decks beside them. And one station already did it. Every figure below is measured from satellite imagery and shown as a range.
One station already did it
Already carries the world's largest solar bridge — about 4,400 panels (~1.1 MWp) generating roughly half the station's electricity, switched on in 2014. — Network Rail. Proof a working station roof can carry serious solar. Our own measurement of that deck came out at 1.4 MWp — a useful check that the method lands close to reality on a roof that panels can actually sit on.
The roofs that could take it
Modern flat decks, concrete slabs and canopies — the station roofs panels could realistically sit on, ranked by what they could hold. Drag the handle on any one: the aerial on the left, the measured annual sun on its roof on the right.
1960s flat concourse deck
London
Concrete deck with an ETFE atrium (2015)
Birmingham
London Blackfriars
Already solar ✓Solar bridge deck over the Thames (2012)
London
Glazed platform roof between brick towers
London
Grimshaw steel-and-ETFE canopies (2014)
Reading
Platform roof under an office deck (1990)
London
Low-pitch lattice-girder canopies
Sheffield
Grimshaw 'ribbon' canopy (2018)
London
1930s GWR platform canopies
Cardiff
The buildable leaderboard
Station roofs panels could realistically sit on, ranked by capacity.
| # | Station | Roof | Roof capacity | Est. annual generation |
|---|---|---|---|---|
| 1 | London Euston London | 1960s flat concourse deck | 2.7 MWp | 2.1–2.6 GWh |
| 2 | Birmingham New Street Birmingham | Concrete deck with an ETFE atrium (2015) | 1.5 MWp | 1.2–1.4 GWh |
| 3 | London Blackfriars London · already solar ✓ | Solar bridge deck over the Thames (2012) | 1.4 MWp | 1.2–1.4 GWh |
| 4 | London Cannon Street London | Glazed platform roof between brick towers | 1.3 MWp | 1.0–1.2 GWh |
| 5 | Reading Reading | Grimshaw steel-and-ETFE canopies (2014) | 1.2 MWp | 998 MWh–1.2 GWh |
| 6 | London Charing Cross London | Platform roof under an office deck (1990) | 673 kWp | 555–678 MWh |
| 7 | Sheffield Sheffield | Low-pitch lattice-girder canopies | 611 kWp | 453–555 MWh |
| 8 | London Bridge London | Grimshaw 'ribbon' canopy (2018) | 437 kWp | 324–397 MWh |
| 9 | Cardiff Central Cardiff | 1930s GWR platform canopies | 287 kWp | 235–285 MWh |
The great glass sheds
The magnificent ones — Paddington, St Pancras, Glasgow Central. Google can measure the whole roof plane, and the numbers are huge. But these are listed heritage glass roofs built to admit light: you can't bolt panels onto them. So this is roof-plane potential, shown for the sun these cathedrals catch — not capacity you could install. The exception is King's Cross, which found a sympathetic way: ~240 kWp of glass-laminated PV woven into its barrel vaults.
Vast glazed ridge-and-furrow shed
Category A listed ·Glasgow
Listed glazing — measured for the light it catches, not panels you could fit.
Barlow single-span glass shed (1868)
Grade I listed ·London
Listed glazing — measured for the light it catches, not panels you could fit.
Dobson's curved arched shed (1850)
Grade I listed ·Newcastle upon Tyne
Listed glazing — measured for the light it catches, not panels you could fit.
London King's Cross
BIPV ✓Cubitt barrel-vault sheds (1852)
Grade I listed ·London
Listed glazing — measured for the light it catches, not panels you could fit.
Brunel's arched glass shed (1854)
Grade I listed ·London
Listed glazing — measured for the light it catches, not panels you could fit.
Modern glazed platform roof (2002)
Leeds
Listed glazing — measured for the light it catches, not panels you could fit.
Twin arched iron-and-glass sheds
Grade II listed ·Liverpool
Listed glazing — measured for the light it catches, not panels you could fit.
Twin glazed overall sheds
Grade II listed ·London
Listed glazing — measured for the light it catches, not panels you could fit.
Wrought-iron-and-glass shed (1875)
Grade II listed ·London
Listed glazing — measured for the light it catches, not panels you could fit.
Curved wrought-iron shed (1878)
Grade I listed ·Bristol
Listed glazing — measured for the light it catches, not panels you could fit.
Curved multi-span glass shed (1877)
Grade II* listed ·York
Listed glazing — measured for the light it catches, not panels you could fit.
Glazed ridge-and-furrow roof (1922)
London
Listed glazing — measured for the light it catches, not panels you could fit.
Small trussed-arch shed, largely built over
Grade II listed ·London
Listed glazing — measured for the light it catches, not panels you could fit.
And your roof?
The same maths on a normal house: a typical UK semi — south-facing, 4.5 kW of panels, roughly £6,000–£9,500 to install — comes out at an estimated £446–£895 a year in bill savings and export income, paying back in about 9.4–14.1 years (typical 2026 figures).
Roof-plane figures are measured from satellite imagery with Google Solar and shown as ranges; listed glazed roofs can't take bolt-on panels, and a survey confirms any workable layout. Full methodology: how we measure. Imagery 2020–2022–2023–2024–2025.Includes solar data from Google.
That was someone else's roof.
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Solar savings calculator
Annual benefit and payback in honest UK ranges.
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Is my roof suitable for solar?
Direction-led explanation, with the quick roof check.
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