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Mars, Incorporated has unveiled a landmark £190 million investment programme designed to transform its historic Slough factory into a "next-generation" manufacturing centre. The project, which covers capital expenditure from 2023 through 2028, represents a structural modernisation of the site that produced the original Mars Bar in 1932.
The initiative is a central component of Mars’ broader UK strategy, following more than £118 million in capital investment across its Snacking, Food, and Petcare segments during the 2024–25 period alone.
Optimisation via Digital Twin Technology
A primary differentiator for the modernised Slough site is the deployment of Digital Twin technology. By creating a high-fidelity virtual replica of the factory floor, Mars is utilising AI-driven data to simulate and optimise production cycles in real time.
Key Technical Advantages Include
Precision Process Control: Enhancing consistency and uniformity across high-volume product lines such as GALAXY, MALTESERS, and MARS.
Waste Reduction: AI-led decision-making allows for the identification of inefficiencies in the manufacturing loop, significantly lowering material loss.
Real-Time Analytics: Enabling floor managers to make data-backed adjustments without disrupting the physical production flow.
Adam Grant, General Manager for Mars Snacking UKI, stated that the investment ensures operations remain "world-class, competitive, and fit for the future," signalling a long-term commitment to the UK as a primary manufacturing and innovation hub.
Transitioning to an AI-Enabled Workforce
The investment programme moves beyond hardware upgrades to focus on the "human infrastructure" required for automated food processing. Mars is implementing an extensive workforce upskilling programme to transition current roles into advanced engineering, automation, and AI-enabled manufacturing positions.
The organisation is also leveraging its role as a major local employer to drive diversity within its technical pipeline. Supported by VisionPath, Mars has reported that 77 per cent of its apprentices now come from ethnically diverse or low socio-economic backgrounds, addressing a critical need for broader representation in the STEM and manufacturing sectors.
Importance and Export Reach
While the Slough factory remains deeply rooted in British heritage, its operational reach is multinational. The site functions as a primary export hub, supplying demand for the United Kingdom while distributing products to Ireland and the Netherlands.
Business and Trade Secretary Peter Kyle characterised the £190 million injection as a "strong vote of confidence" in British skills and industry. By integrating advanced cooling systems and energy-efficient utilities, Mars is also aligning the facility with its global ESG (Environmental, Social, and Governance) targets, reducing the carbon intensity of its European snacking operations.
As the global confectionery and snacking sectors face rising costs and supply chain volatility, the success of the Slough transformation will serve as a benchmark for how heritage manufacturers can successfully pivot to "intelligent" production models.
By securing massive domestic capacity and investing in the "agentic" capabilities of its workforce, Mars is de-risking its UK portfolio against future industrial shifts while maintaining its position as a primary infrastructure provider for the global treat market through the end of the decade.
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