Here is the British government advice on the matter
That is a British addition designed to stop Listeria,
a prob w/ smoked products and, I hear, is actually a good rule.
But there are British food safety rules that do.
"Our priority in the EU is the health of our citizens as well as safeguarding our standards in terms of public health and food safety - the highest in the world.
“In the UK, smoked kippers that are sold online must be kept to an acceptable temperature throughout transit. Businesses must ensure the materials used to do so are suitable for the food and the conditions of use.”