Shaw the simple reason that I would like to have the meat labelled as halal is that 20% of halal meat is slaughtered without prior stunning.
Perhaps if you read the links you also could be aware of this salient point.
I assume you are either a vegan or complete hypocrite.
Your point is?

The reasons for long distance trucking is the reduced number of slaughter houses-partly due to economies of scale, partly due to EU regulations

http://webarchive.nationalarchives.gov.uk/20120414053640/http://www.food.gov.uk/multimedia/pdfs/board/fsa080504a2.pdf

https://ec.europa.eu/food/animals/welfare/practice/slaughter_en