I don't understand why this is a problem. 90% of the animals are stunned before they are killed anyway - so what is the problem?
I do think it should be labelled as there are some religeons (sihks i think) for who this would be a problem but people getting upset over halal meat served in subway/pizza express? REALLY? To me it just sounds like an excuse for prejudice. Those people quite happy to eat the meat from there tht is not halal and probably don't give a flying fuck what happened to the animals during their lives or at their slaughter. If you were tht worried about that sort of thing you would a) be vegetarian/vegan or b) only ever eat meat that you knew where it came from and that was treated properly. Am i being niave that thinking that having to respect and pray for an animal at slaughter (even if the slaughter is not pleasant) that they may well have good welfare standards? Most of the meat you get from TEsco comes from the EU and the standards don't meat the UK standards for living conditions.