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Interim Commercial Finance Manager(Supply Chain, Business Partnering, Business Cases)£400 to £500 per day3 to 4 monthsSurrey / Hybrid (2 days a week in the office ideally)We are supporting one of the most iconic retail businesses in the world on a major value delivery programme across their supply chain.They are looking for an experienced Interim Commercial Finance Manager to step in and act as a true commercial business partner across finance, procurement and operations.This is a high-impact role focused on business case analysis, supply chain cost insight, value tracking and ensuring major initiatives deliver real financial outcomes, not just good intentions.If you enjoy working at pace, challenging assumptions, building robust analysis in Excel and presenting clear commercial insight to senior stakeholders, this will suit you.What you’ll be doingActing as a true commercial finance partner across supply chain, procurement and programme teamsLeading end-to-end business case analysis, challenging assumptions, phasing, risks and financial impactBuilding and stress-testing advanced Excel models, validating inputs and ensuring value stacks upDelivering commercial analysis across supply chain and operational cost drivers, identifying opportunities and risksPartnering with project managers to ensure financials align with delivery plans and milestonesSupporting procurement-led initiatives with clear governance, savings methodology and value assuranceTracking value delivery at initiative level, updating savings, confidence, risks, timing and ownershipProducing senior-ready commercial insights and commentary for CFOs, GMs and non-finance leadersHighlighting slippage, cost pressure and required actions early, keeping programmes honest and on tr