The recent furore over halal meat has focused attention on how our meat is killed and processed. But beyond the ethical and religious debate over halal, are there bigger concerns about how abattoirs are regulated and policed? Companies have been fined for failing to remove body parts associated with the human form of mad cow disease, BSE. Now there are plans to shake-up the inspection process which critics say this could lead to more infected animals entering the food chain. There are also claims that vets based in abattoirs to monitor animal welfare - and inspectors who check meat we eat is safe - regularly face threats and intimidation. Allan Urry investigates the grim realities of the slaughterhouse. Producer: Carl Johnston.