divebuddy - sorry, I'm confused as to which laws have been ignored. This from the link provided in the OP -
"Is KFC's halal chicken stunned before slaughter?
Yes, due to our strict animal welfare standards, we insist that all our poultry is stunned before slaughter. Our halal chicken has been accredited by the Halal Food Authority, one of the most widely recognised bodies in the UK and overseas. It allows the use of a technique called 'stun-to-stun' - a pain free process that makes the animal insensible to pain and suffering. A verse is also recited from the Qu'ran at the point of slaughter by an appropriate person and the poultry will not come into contact with non-halal meat at any point in the supply chain.
The HFA accreditation which is clearly signposted in the participating restaurants allows us to offer halal accredited meat whilst remaining committed to the same animal welfare standards as before, which meet or exceed all relevant UK and EU legislation."
All I know is I'd eat it however it's prepared, unfortunately it's too far to schlep to a store.