Here's why it's difficult to get that information:
* No National Pig Census: Unlike some countries, the UK doesn't conduct regular national pig censuses.
* Varying Farm Sizes: Farms come in all sizes, from small hobby farms to large industrial operations.
* Dynamic Population: The pig population changes due to births, deaths, and movement between farms.
However, you can find some helpful information:
* Defra (Department for Environment, Food and Rural Affairs): Defra publishes agricultural statistics, including pig meat production, which can give you an idea of the approximate pig population.
* National Pig Association (NPA): The NPA is a trade association that represents pig producers in the UK. They might have some data on pig numbers or be able to point you to resources with estimates.
Hope this helps!