If you actually cared about this and looked into it rather than bending to hearsay you would quickly discover than over 90% of all halal meat in the UK is slaughtered in basically the same way as normal meat, i.e it is stunned first.
That's absolutely fine... Why the issue then when groups call for all animals to be stunned first? Seems like a reasonable recommendation for a change in the law to me yet its met with opposition.