shoulder of Lamb

"You can bring any fruit, vegetables, meat, dairy or other animal products (eg fish, eggs and honey) into the UK if you’re travelling from a country within the EU."

Source: https://www.gov.uk/bringing-food-animals-plants-into-uk/food

That is for travel to the UK from other EU countries, but I daresay the reverse is true. And I've no idea if it applies specifically to cabin baggage.
 
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