True Stories: Pig Business is a shocking feature-length documentary which explores in gruesome detail how intensive pig farming for the meat industry is affecting both our own health and the environment.

It’s on More 4 tonight at 10:00pm and you really do need a strong stomach to watch it. The film shows how the pork rearing industry is making a mockery of animal rights and driving traditional, small-scale and humane farmers to the wall.

Eco-campaigner Tracy Worcester – a former actress and now Marchioness of Worcester – has campaigned for years for quality food, animal rights and environmental protection through a revitalisation of rural economies. And she believes that people need to become active and aware consumers, which is why she decided to make this film.

Pig Business is the culmination of Tracy’s four-year investigation into intensive pig farming in which she argues that intensive production systems harm human and environmental health, and is pushing traditional farmers out of business.

In the film, which is part of the Great British Food Fight season, she travels from the UK to the US and Poland during her investigation and meets local people who believe their health has been affected by the new pig production methods. She also meets and talks with leading politician and environmental campaigner Robert Kennedy Junior.

Worcester then confronts industrial farming executives with her findings and argues that supermarket labelling is not a reliable guide to where pork actually comes from.

This is a film that contains many shocking scenes and one which is sure to disturb those concerned with animal welfare, so be warned that it’s not suitable for all.