Andy Billman has photographed dozens of bricked-up windows across London for a series that examines how light and air in architecture affects wellbeing.

image copyrightAndy Billmanimage captionHazlitt Road

Having initially taken an interest in their aesthetics, Billman was fascinated to discover many of the windows would have been blocked up centuries ago, to avoid tax.

"Documenting my surroundings to resurface the story of the window tax feels very timely, as the last year has proven natural light and fresh air have been more important than ever," he says.

image copyrightAndy Billmanimage captionAlbert Street, mid-19th Century

Window tax was introduced in England and Wales, in 1696, and Scotland, in 1748.

The more windows a building had, the more its owner had to pay.

Initially applied to buildings with more than 10 windows, the tax was later extended to include those with seven or more.

image copyrightAndy Billmanimage captionChiswell Street, circa 1701

The tax was intended to be progressive, as the least wealthy would, in theory, live in smaller houses with fewer windows.

However, in urban areas, poorer people commonly lived in large tenement buildings, which, regardless of how they were subdivided, were considered to be a single dwelling and subject to heavy tax.

Consequently, many landlords blocked up their tenants' windows or passed on the extra cost in rent.

image copyrightAndy Billmanimage captionAbingdon Villas, circa 1850-64

The lack of light and ventilation is thought to have greatly affected people's health and wellbeing and allowed epidemics to quickly spread.

image copyrightAndy Billmanimage captionGerald Road, early 19th Centuryimage copyrightAndy Billmanimage captionBedford Place, circa 1800-03

Writer Charles Dickens frequently spoke out against the tax and, in 1850, said: "Neither air nor light have been free since the imposition of the window tax.

"We are obliged to pay for what nature lavishly supplies to all, at so much per window per year, and the poor who cannot afford the expense are stinted in two of the most urgent necessities of life."

image copyrightAndy Billmanimage captionPitt Street, circa 1844-64

Window tax was finally repealed in 1851, following pressure from doctors and campaigners.

image copyrightAndy Billmanimage captionSudeley Street, circa 1840image copyrightAndy Billmanimage captionSouth Eaton Place, circa 1835

Billman has photographed more than 80 buildings in London and hopes to expand the series to include the rest of the UK.

"The juxtaposition between appreciating the visual beauty of these overlooked bricked-up windows, yet at the same time how they tell the adverse story of people being robbed of natural light, fascinates me," he says.

"Creating photography that makes you take a moment to look beyond the surface to explore these two opposing themes is what I hope viewers take away."

image copyrightAndy Billmanimage captionDavies Street, circa 1723-25image copyrightAndy Billmanimage captionScarsdale Villas, circa 1850-64

Daylight Robbery will be on exhibition at the Bermondsey Project Space, as part of London Festival of Architecture 2021, 22-26 June.