The British Lion stamp on eggs tells you alot more than just the best before date - who knew about the numbering system to show whether they're from caged or free-range hens?

Egg marking - Wikipedia

Cage-free or free-range? What those egg labels really mean

British Lion Eggs, What Does the Lion Stamp Mean

Horrifying truth of the brutal life of free range hens laid bare - Mirror Online

Salmonella in Eggs: It's Poisonal — Randy's Chicken Blog

Poultry Times October 24 Issue by The Times - Issuu

Know your eggs? Making sense of supermarket labelling

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Exposed: The shocking and filthy conditions endured by supermarket hens in 'enriched cages', The Independent

How laying hens are kept around the world

What's written on your egg? - Food Safety Guru

Food manufacturers should put Lion mark on egg-based products

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The joy of eggs – how 'nature's multivitamin' shook off the scare stories, Eggs