IN Brief:
- Mars is investing £190m to turn its Slough chocolate factory into a next-generation manufacturing hub.
- The programme includes robotics, AI, upgraded machinery, advanced cooling systems, energy-efficient utilities, and digital twin technology.
- The project reinforces the role of automation, process data, and energy efficiency in high-volume confectionery production.
Mars is investing £190m in its Slough chocolate factory, with a major upgrade programme designed to strengthen one of the company’s key UK confectionery manufacturing sites.
The investment will introduce robotics, AI-enabled systems, upgraded machinery, advanced cooling, and energy-efficient utilities across the factory. Mars will also deploy digital twin technology at the site, using production data to model, optimise, and improve manufacturing processes.
Slough has long been a strategically important site for Mars’ UK chocolate operations. The new investment puts capital into manufacturing performance, with emphasis on process control, operational efficiency, equipment capability, and long-term site competitiveness.
Food manufacturers are being forced to make harder capital decisions as energy costs, labour availability, packaging regulation, retailer pressure, and ingredient volatility continue to squeeze margins. In that environment, major site spending has to deliver more than extra capacity. Investment has to improve reliability, reduce waste, support flexible production, and generate data that engineering teams can use across daily operations.
Digital twin technology is particularly relevant in confectionery, where product consistency depends on tight control of processing conditions. Chocolate production places heavy demands on temperature management, cooling performance, flow behaviour, formulation control, and packaging coordination. A live digital model of production can help teams test scenarios, identify bottlenecks, and improve repeatability without relying only on manual adjustment and retrospective troubleshooting.
Automation is becoming just as important as manufacturers manage SKU complexity and labour constraints. Confectionery factories increasingly have to handle seasonal demand peaks, multipack formats, retailer-specific requirements, and tighter quality expectations. Robotics and intelligent control systems can support speed and consistency, provided they are properly integrated with ingredients handling, line cleaning, packaging, inspection, and maintenance.
Mars’ Slough project comes as the confectionery sector faces pressure from cocoa costs, reformulation demands, sugar-reduction targets, and packaging transition. Alternative ingredient work is already gathering pace, with Cargill and Voyage scale cocoa-free confectionery showing how manufacturers are testing new routes through cocoa volatility. Factory investment gives major producers another lever: better control over process performance, energy use, output quality, and line flexibility.
The UK manufacturing context adds further weight. Food and drink remains one of the country’s most important manufacturing sectors, but investment is being tested against tax, skills, energy, and regulatory uncertainty. A £190m commitment at a mature UK site suggests that established factories can still attract major capital when the upgrade case is built around automation, data, and process resilience.
For confectionery manufacturing, Slough points toward a more digital production model. The next generation of factory investment will not be judged only on output tonnes or line speed. It will be judged on how equipment, utilities, process data, maintenance, and packaging systems work together under cost pressure and regulatory scrutiny. Mars is placing that model inside one of the UK’s most recognisable chocolate manufacturing operations.
