In my opinion, any animal slaughtered for food in the UK should not be conscious while it is being killed. End of. I don’t think any religious practices should be allowed to override basic animal welfare rights and laws around humane food production (although I’m pretty sure these are not always strictly adhered to, anyway). Any imported meat which has been slaughtered according to practices which involve the animal being aware at the point of slaughter should be labelled as such by law all the way through the supply chain.