Shirley Windmill: A Deep Dive into Croydon's Last Tower Mill
Turn off Upper Shirley Road in the London Borough of Croydon, follow a short residential close past entirely ordinary suburban houses, and you walk straight into the nineteenth century. At the end of Postmill Close stands Shirley Windmill, a tapering brick tower mill crowned with a cap and sails - the last surviving windmill in Croydon and one of only a handful left anywhere in Greater London. Grade II listed and restored to working order, it is a startling sight: a full-scale piece of Victorian rural industry marooned in a sea of twentieth-century housing. This deep dive tells the story of how it got there, how its machinery works, and how a determined community brought it back to life.
A mill before the suburb
Today Shirley is a comfortable residential district on the southern edge of Greater London, but in the early nineteenth century it was open countryside: farmland, heath and scattered cottages on the road between Croydon and West Wickham. Local farmers needed their grain ground close to home - carting sacks of corn over rough roads was slow and costly - and so a windmill was raised here to serve the neighbourhood. That first mill was a post mill, the older of England's two great windmill families, in which the entire wooden body of the mill, machinery and all, balanced on a massive central post and was turned bodily to face the wind. The name of the modern street, Postmill Close, quietly preserves its memory. For decades the wooden mill ground corn for the surrounding farms, one link in a chain of mills that once ringed London wherever there was a hilltop or common with a clean run of wind. Croydon and its villages supported a number of mills over the centuries. Of all of them, only the mill at Shirley still stands.
Fire, and a tower of brick
Wooden post mills led dangerous lives. They were timber-framed structures filled with flour dust, turning ironwork and fast-running wooden gearing, and a single overheated bearing or a stroke of lightning could set one alight. Fire was the great destroyer of English windmills, and in 1854 it claimed the mill at Shirley: the old post mill burned down. Its replacement, built on the same spot soon afterwards, belonged to a newer and more robust breed. The present Shirley Windmill is a tower mill: a tapering tower of brick in which only the cap at the very top, carrying the sails and the windshaft, rotates to face the wind. The advantages were considerable. Brick resists fire and weather far better than timber, the fixed tower offers generous storage space on several floors, and greater height lifts the sails into cleaner, stronger wind. Yet the new mill was, in a sense, already behind the times. By the middle of the nineteenth century steam power was spreading through the milling trade, and the brick tower at Shirley would prove to be one of the last windmills ever built in the Croydon area.
Inside the machine
Step inside on an open day and the logic of the building unfolds floor by floor. At the top, the cap carries the windshaft, the great inclined axle to which the sails are fixed. Tower mills of Shirley's era were normally steered by a fantail, a small wind-wheel mounted at the rear of the cap which senses any change in wind direction and gears the cap slowly round so that the sails always face square into the weather - an elegant piece of self-regulating Victorian automation. Inside the cap, the brake wheel on the windshaft drives the wallower, which turns the upright shaft running down the core of the tower. Further down, the great spur wheel transfers that power to the stone nuts, each of which spins a runner stone above its stationary bedstone. Grain fed between the stones is sheared and ground into meal, which slides down chutes to the floors below to be sifted and bagged. A sack hoist, driven from the same shaft, hauls grain to the top of the mill so that gravity can do the rest of the work. Nothing about the arrangement is decorative; every beam, wheel and chute earns its place.
The last harvests
By the closing decades of the nineteenth century, the economics that had justified the mill were collapsing. Cheap grain from overseas poured into London's docks, where enormous steam-driven roller mills ground it faster, more cheaply and more consistently than any pair of millstones turned by the wind. At the same time the city itself was advancing outwards: railways and speculative builders were transforming the farmland of Surrey and Kent into suburbs, and the fields that had supplied Shirley's mill with corn were disappearing under bricks and mortar. Like almost every other windmill in the region, Shirley's could not compete, and commercial milling here came to an end in the late Victorian period. Across Greater London the same story played out again and again, and today only a small number of windmills survive in the capital - among them the mills at Brixton, Wimbledon Common and Upminster, each a rare fixed point in an ever-changing city. That Shirley's tower outlived its trade at all is largely an accident of good fortune, sturdy brickwork and, later, deliberate care.
Rescue, restoration and the Friends
Redundant windmills usually met one of two fates: conversion or demolition. Shirley Windmill escaped both. In the twentieth century the mill passed into the hands of the local authority, and public ownership shielded it while housing rose on every side. Decades of weather still took their toll on cap, sails and timberwork, and by the late twentieth century the building needed serious intervention. A major restoration in the 1990s returned the mill to sound condition, renewing the cap and sails and conserving the machinery within, and the building's Grade II listing recognises its significance as a rare survivor of London's milling past. Just as important as the fabric is the community around it. The mill is cared for and opened to the public by the Friends of Shirley Windmill, a volunteer group whose members guide visitors through the building, maintain its interior, welcome school groups and keep the story of the mill alive in the local area. Without such volunteers, buildings like this rarely survive; with them, a redundant industrial structure becomes a living museum.
Visiting Shirley Windmill today
Shirley Windmill is not open every day - it is a volunteer-run heritage site, and visits are concentrated on advertised open days, typically on selected Sundays during the warmer months, along with special occasions such as the national mills weekend each spring, when mills all over Britain throw open their doors. A visit takes the form of a guided tour, climbing from the ground floor up through the working levels of the tower, with the machinery explained as you go. The tours are unhurried and genuinely informative, pitched as well for curious children as for dedicated mill enthusiasts. Because the mill stands in a residential close, visitors are asked to arrive considerately, and it is sensible to check the Friends' announcements for current dates and times before setting out. The surrounding area rewards a longer stay: Shirley borders some of south London's best green spaces, and the wooded viewpoint of the Addington Hills, with its panorama across London, is close at hand. Few capital cities anywhere can offer a genuine Victorian tower mill twenty minutes from a tram stop.
Explore on the map
Shirley Windmill is one of thousands of mills recorded on our interactive map, from the surviving windmills of Greater London to tower mills, post mills and smock mills across Europe and beyond. Open the map, zoom in to Croydon to find the tower at Postmill Close, and then follow the markers outwards - you may be surprised how many mills are still standing quietly at the edge of your own neighbourhood.