about 42 percent
Ah, your link says
"
Religious slaughter
- In the UK, 58 percent of Halal meat comes from animals which have been stunned before slaughter and certified Halal.
- All animals slaughtered under the Shechita (for Kosher) are non-stunned.
your link also says
chickens (9.7 percent of total slaughtered)
sheep (25 percent of total slaughtered)
cattle (1.1 percent of total slaughtered)
I will admit I am surprised Sheep is so high. I wonder why?