Britain’s quiet productivity engine: 139m castors and the case for upgrades

Hidden beneath conveyor lines, inside changeover trolleys and on the underside of mobile racks lies an unglamorous but essential element of UK manufacturing: castors and wheels.

A new analysis of public datasets and sector modelling by Coldene estimates that about 34.9 million mobile handling units in British factories, hospitals, warehouses and airports, are supported by roughly 139.4 million industrial castors. With manufacturing accounting for 93% of Britain’s movement‑engineering footprint, measured against an estimated £452bn of manufacturing sales in 2024, these components are a material part of plant availability and throughput, rather than an incidental expense.

Wheel design, bearing quality and tyre material all determine how quickly a trolley or rack moves, how reliably it runs under load and how often it requires intervention. In high‑mix or high‑change environments, a single failed wheel can stop a production cell while teams replace or workaround the fault. When multiplied across millions of wheeled assets, failure rates translate into measurable losses of overall equipment effectiveness (OEE), slower changeovers and increased unplanned downtime.

The problem

Labour and safety consequences make the issue more acute. Poor mobility raises manual‑handling effort and the risk of injury, which drives absence and increases reliance on already scarce skilled operators. HSE data indicate sickness absence remains elevated relative to pre‑pandemic levels, and vacancy rates and skills shortages in parts of manufacturing are persistent. Against that backdrop, relatively small engineering improvements that reduce physical strain and stoppages protect labour capacity and help maintain shift delivery without additional hiring: smarter mobility is a simple and practical way to squeeze more output from existing labour and reduce costs.

The economics also favour prevention over cure. Movement‑engineering choices are fundamentally a total‑cost‑of‑ownership question: spending more on higher‑grade wheels, better bearings or fitted brakes increases capital cost but can cut spare‑parts usage, service visits and downtime. Firms that move from reactive replacement to scheduled servicing commonly report faster payback than from many other incremental investments, because reduced stoppages and lower injury rates deliver immediate operating savings. With the sector at risk of significant cuts in the November budget, economical productivity gains matter more than ever.

The argument for optimised movement engineering sits within a wider industrial context. Manufacturing output showed intermittent weakness through late 2024, with the ONS Index of Production recording periods of decline, although the latest data from October 2025 was showing tentative signs of recovery. Those signals, combined with constrained public spending and ongoing policy uncertainty, make low‑complexity interventions that improve effective capacity particularly attractive to plant managers and operations directors.

Next steps

Sectoral and regional patterns will matter for targeting interventions. For instance, the analysis shows movement intensity is highest in machinery and metal products, food & drink, and automotive and transport equipment: these are sectors that use numerous carts, changeover trolleys and mobile jigs. Geographically, clusters in the Midlands and North East also have above‑average castor density, suggesting retrofit pilots and distributor activity in those areas would address concentrated need, and may also produce clearer ROI for local supply chains.

For manufacturers surveying the current landscape, the practical next steps are simple:

• Audit wheeled assets to identify high‑use and high‑failure items;
• Quantify downtime and manual‑handling incidents attributable to mobility failures;
• Trial higher‑specification components or preventative maintenance on representative lines;
• Measure OEE and safety outcomes;
• Where significant gains appear, scale the changes and capture the procurement and spare‑parts data to sustain improved maintenance regimes.

The castor under a trolley is not an island; it exists at the junction of design, maintenance, safety and procurement. Addressing movement engineering is a low‑hassle but high‑leverage way for firms to protect throughput, reduce risk to operators and extract more capacity from existing labour. This is a practical lever at a time when hiring and public support are constrained.

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