How Corporate Events Hit Sustainability KPIs Without the Greenwash

Most catering sustainability statements follow the same template. A paragraph about locally sourced ingredients. A mention of recyclable packaging. A photograph of a field. Possibly a logo from a certification body that costs £400 a year and requires nothing to maintain. The problem is not that caterers are lying. The problem is that nobody is asking the specific questions — and the catering industry has learned, collectively, that vague language is safer than precise claims that can be checked. That is changing. Corporate procurement teams, film production sustainability departments chasing albert certification, and NHS and council commissioning teams scoring against social value frameworks are starting to ask those specific questions. This post is written for the people doing the asking — and for clients who want to understand what separates a real sustainability position from a well-designed PDF. The Procurement Gotcha Most Caterers Cannot Pass Here is the failure mode, repeated constantly in corporate catering procurement. A PA or operations manager sends an enquiry with a sustainability question tacked on at the end: 'Do you have a sustainability policy?' The caterer replies yes. A PDF arrives. It says things like 'we are committed to reducing our environmental impact' and 'we work with local suppliers wherever possible.' The procurement checklist gets a tick. The event happens. Nobody goes further. If you are a sustainability officer, a production coordinator working under an albert-certified production, or a council contracts manager scoring against the Social Value Act, that tick is worthless unless the claims underneath it can be verified. The UK CMA Green Claims Code is unambiguous on this: environmental claims must be accurate, substantiated, and not omit material information. 'Locally sourced wherever possible' fails all three tests simultaneously. The practical consequence for your organisation is reputational: if a claim turns out to be hollow and it appears in your event's sustainability report, the problem becomes yours as much as theirs. The Five Questions Any Procurement Officer Should Ask 1. Name your top four suppliers and tell me how far they are from your kitchen. A catering operation that cannot answer this without hesitation does not have local supply chains — it has a local sourcing aspiration. The answer should include business names, towns, and approximate mileage. It should also include any suppliers that are not local, because honesty about the gaps is what makes the local claims credible. Our answer: Prima Bakeries in Scorrier (5 miles) for bread. RJ Trevarthen in Penryn (10 miles) for meat. Westcountry Food in Falmouth (11 miles) for dairy, fish, and dry goods. Continental Fruit & Veg in Liskeard (47 miles) for fruit and vegetables. We also collect from Booker in Pool (3 miles) for top-ups, cleaning supplies, gloves, tea, and coffee — and we are telling you that because it is true and because a caterer who hides their cash-and-carry use is telling you something about how they handle disclosure generally. 2. How does food get from your suppliers to your kitchen, and from your kitchen to our event? The transport question is where sustainability claims often collapse. If four suppliers are making individual deliveries from different parts of the country, and the catering team then arrives at your event with two vehicles in two separate trips, the local sourcing claims in the brochure are doing a lot of work to cover a fairly ordinary logistics picture. What to look for: suppliers who deliver as part of existing rounds (so your catering business is not generating extra journeys), and consolidated outbound logistics (one vehicle, one trip). Our four main suppliers all deliver to us as part of their existing Cornwall distribution routes — they are coming this way regardless of whether we order or not. We collect from Booker on the A30 corridor on the same pass. One van, loaded once, leaves our kitchen in Redruth and goes to your event. 3. What packaging do you use, and can I see a sample? The correct answer should not include 'we are working towards' or 'by end of [year]'. If packaging changes are genuinely in progress, that is worth noting — but the current state should be named clearly. Ask for brand names, not adjectives. Our current position: no conventional single-use plastics in service. CupsDirect FSC-certified kraft boxes for platter service. Bagasse pots (sugarcane pulp) for hot food. Wooden cutlery. Unbleached biodegradable napkins. Beeswax wraps in the kitchen for prep and storage. This is where we are now — not a target, not a roadmap slide. 4. How do you handle food waste? WRAP's research estimates that UK hospitality and food service generates approximately 1 million tonnes of food waste per year, with overproduction at service being one of the primary causes. The structural driver is the buffet model: prep for 100, serve 70, bin 30 portions. The operational answer to this is not a composting arrangement — it is not over-producing in the first place. Event catering is different from restaurant catering in one important structural way: we have a confirmed guest count before we cook anything. Every event starts with a number. We prep to that number. There is no surplus at the end of service because there was no surplus planned into the production schedule. Composting and donation partnerships are commendable additions, but if a caterer cannot first explain why overproduction does not happen, ask why not. 5. What is your carbon footprint, and how was it calculated? This is the question where the most creative accounting happens, and where procurement teams need to be most sceptical. The correct answer is not a headline number — it is an explanation of methodology. Why Spend-Based Carbon Calculators Overstate Small Caterer Footprints Carbon accounting for small food businesses is genuinely difficult, and a proliferating number of bank and fintech tools are making it easier for businesses to produce numbers — and easier for those numbers to be significantly wrong. Spend-based carbon calculators — including tools offered by business banks and card providers — work by applying average emissions factors to categories of expenditure. The category 'food and beverage' carries an emissions factor derived from the average across the entire food industry: restaurants, processors, manufacturers, and retailers. When a small catering business's card spending on wholesale food purchases is run through that model, the calculator assigns emissions as though the spend were on restaurant meals rather than wholesale food at input prices. The practical result: our own activity-based footprint estimate, working from supplier distances, fuel use, and packaging weights, produces approximately 18 tonnes CO2e per year. A spend-based tool produces approximately 36 tonnes — double — because it treats wholesale food purchasing as if it carried the full embodied emissions of prepared restaurant food, including preparation energy, building energy, and front-of-house operations that do not exist in our model. This is not the fault of the tools. Spend-based calculation is a reasonable first pass for businesses that do not have the data to do activity-based work. But for procurement purposes, a spend-based number from a caterer should be treated as an upper bound, not a verified figure. Ask how the number was produced before putting it into a sustainability report. For what it is worth, we have not published a per-event kg CO2e figure on our public sustainability page. The methodology is not yet defensible to the standard required for a claim that could be scrutinised under the CMA Green Claims Code. When we can publish a number that is properly substantiated, we will. Until then, we will not. What 'Local Sourcing' Actually Means When Scrutinised 'Local' is the most abused word in food marketing. It has no legal definition in the UK, no minimum distance requirement, and no verification mechanism. A caterer can describe food sourced from a regional distributor who sources nationally as 'locally inspired' and not be technically lying. When procurement teams ask about local sourcing, the question they are actually trying to answer is: does this supply chain generate fewer food miles than average, and does money from this event stay in the regional economy? Those are answerable questions, but only if you ask for specifics. A useful framework for evaluating a sourcing claim has three parts. First: are suppliers named? Second: are distances stated? Third: are gaps disclosed? The gaps question is the one most often skipped. A caterer who says 'we source from local farms' but does not mention that their packaging, dry goods, and specialist ingredients come from national distributors is presenting a partial picture. That partial picture is not necessarily dishonest — all food businesses have supply chains that extend beyond the local area — but it should be named. We use Booker in Pool, three miles from our kitchen, for top-ups, cleaning supplies, gloves, and consumables like tea and coffee. Booker is a national cash-and-carry wholesaler. We are not going to describe that as local sourcing, because it is not. We are disclosing it because procurement teams evaluating our operation deserve the complete picture, and because a supplier list with no caveats is the thing that should make you suspicious, not reassured. Made-to-Order vs Buffet: The Structural Waste Argument There is a persistent assumption in sustainability conversations about food that waste is primarily a disposal problem — something to be managed at the end of the process through composting, food banks, or anaerobic digestion. These are all valuable. But the more significant intervention is structural: do not produce the food that would become waste in the first place. The difference between buffet catering and made-to-order event catering is a production planning difference as much as a service format difference. A buffet model, whether in a restaurant or at a catered event, is built around uncertainty. The caterer does not know exactly how many portions of each dish will be taken, so they over-produce to avoid running out. The over-production is a feature, not a bug — it is what makes a buffet feel abundant and prevents the embarrassment of empty trays. The waste is the price of that abundance. A made-to-order model, as used in event catering with a confirmed guest count, removes the uncertainty. We know before we start cooking how many guests are attending. We calculate portions from that number. We do not cook twenty extra portions of each dish to be safe, because there is no safe to hedge against. The guest count is confirmed. The production schedule matches it. Consider a 100-guest event where a buffet model builds in a 15% overproduction buffer as standard practice. That is 15 portions of every dish — prepared, transported, held at temperature, and discarded at the end of service. For a three-dish service, that is 45 wasted portions per event. At ten events in a month, that is 450 portions. At 50 events in a year, 2,250 portions. None of that food was consumed. All of it had associated production energy, ingredient cost, packaging, and transport. The structural argument is not that made-to-order caterers are more virtuous than buffet operators. It is that the model eliminates a category of waste that the buffet model cannot avoid without either running out of food or reducing perceived quality. For corporate events where the catering outcome is part of an ESG report or a social value submission, this structural difference is worth naming explicitly. What Good Corporate Catering Procurement Looks Like Use this checklist verbatim in a procurement questionnaire or adapt for a social value tender question. We have written it to be applicable to any caterer — not only us. Supply chain transparency: Named suppliers with towns and approximate mileage stated. National or regional distributors disclosed alongside local suppliers. Delivery logistics explained (existing rounds vs. dedicated journeys). Packaging: Current packaging described by material type and brand (not adjectives). Single-use plastics position stated (yes/no, not 'we are working on it'). Any in-progress changes dated with realistic timelines. Food waste: Production model explained (confirmed-count made-to-order vs. buffet-style over-production). End-of-service surplus handling described if applicable. No claim of 'zero waste' without a methodology. Carbon and emissions: Calculation methodology stated (activity-based or spend-based). Spend-based numbers treated as upper bounds, not verified figures. No 'carbon neutral' claim without verified offset documentation. Verification: Claims checkable against named suppliers and invoice records if required. Sustainability statement signed by a named individual, not a company. Willingness to provide a per-event sustainability summary on request. For events that fall within an albert-certified production, the albert production certification criteria require food procurement to be documented. A caterer who can provide a per-event summary covering supply chain, packaging, and logistics saves your production sustainability coordinator significant work. For NHS and council contracts assessed under the Social Value Act, a made-to-order operation with named local suppliers and documented supply chain distances maps directly onto the scoring criteria. The Per-Event Sustainability Statement The most useful thing a caterer can give a corporate client is not a general sustainability policy. It is a document specific to your event: these suppliers, these distances, this packaging, this guest count, this confirmed-production-to-serving ratio. We produce this on request. It is not a marketing document — it is an operational summary that you can include in your ESG report, your albert production file, or your social value submission. It covers the supply chain for your event specifically, the packaging used, and the logistics for that day. If you are enquiring about corporate, film and television production, or public sector catering, request our per-event sustainability statement template when you get in touch. We will attach it to your quote. For more detail on how we approach sourcing, waste, and packaging in our day-to-day operation, the Salt Wind sustainability page sets out our current position without the marketing language.