Lion Code of Practice

The British Lion Code of Practice was launched in 1998 in response to the Salmonella-in-eggs crisis of the late 1980s. It is administered by the British Egg Industry Council (BEIC) and delivered through independent third-party certification under Egg Quality Assurance (EQA). Around 90% of UK eggs carry the Lion mark — it has become the de-facto baseline for the UK retail egg supply chain.

The Code covers the full chain: breeding, hatching, rearing, laying-flock vaccination, feed milling, grading, packing, ingredient processing and transport. Every link in the chain holds its own EQA certificate; without a chain that is Lion-certified end-to-end the finished pack cannot carry the Lion mark.

The defining feature of the Lion Code is mandatory Salmonella vaccination of all laying flocks against Salmonella Enteritidis and Salmonella Typhimurium. The vaccination is delivered to pullets during rearing and is verified through periodic flock-testing. Salmonella prevalence in UK Lion-marked eggs has fallen close to zero since the regime was introduced, and Lion-marked eggs are accepted by the UK Food Standards Agency as safe to be eaten raw or lightly cooked by vulnerable groups.

Every Lion-marked shell egg is individually stamped with the producer code (country, farming method, farm ID) plus the Lion logo and 'best before' date. The stamping happens at the packing centre and provides shell-level traceability back to the laying house. Manufacturers using shell eggs as an ingredient receive eggs that are already individually traceable; those using liquid or dried egg ingredient inherit the chain through the EQA certificate of the processor.

For food manufacturers using liquid pasteurised egg, dried egg or egg powder as an ingredient, the Lion chain operates through the EQA certificate of the egg processor. Manufacturer responsibilities at goods-in are to verify the certificate is current, to capture batch-level traceability from the processor back to the originating flocks, and to maintain segregation between Lion-marked and non-Lion ingredient where both are used on site.

Every major UK retailer requires Lion-marked eggs for shell-egg own-brand and for most egg-ingredient categories. Many retailer codes specifically reference the Lion Code as the baseline. Higher tiers (M&S, Waitrose, Tesco Finest) layer additional welfare expectations on top — typically RSPCA Assured or scheme-specific welfare deltas — but Lion remains the food-safety baseline underneath.

• Buying egg ingredient from a non-Lion processor and not realising the finished claim cannot carry through.
• Mixing Lion and non-Lion ingredient on the same line without segregation evidence.
• Letting the processor's EQA certificate lapse and continuing to apply the Lion mark to outgoing finished product.
• Confusing Lion-mark traceability with breed or welfare information — Lion is primarily food safety and traceability; welfare claims need separate certification.