Jewish and Muslim leaders recently said methods used for halal and kosher meat were "at least as humane as conventional mechanical slaughter" after a top vet called for reforms of religious slaughter practices.
The British Veterinary Association's president-elect, John Blackwell, predicted earlier this year that there could be a total ban on the "inhumane" practice of killing animals without stunning them first.
However, Shuja Shafi of the Muslim Council of Britain and Jonathan Arkush from the Board of Deputies of British Jews wrote in the Guardian that "compassion and animal welfare stand at the centre of the entire process."
More top news
Drug gangs in Mexico City commonly dump the corpses of their victims in public as a way of sending warnings.
Theresa May still wants to press on with her plan to trigger Article 50 by March, which would mean Britain could leave the EU by March 2019.
Donald Trump's spokesman says the president's claim of mass voter fraud was based on "studies and evidence", but refused to give details.