Tesco offers a range of halal meat products that are certified and clearly labeled as halal. They provide halal meat and dairy options in specific sections of their stores and online. However, in a small number of stores, they also sell un-stunned halal meat, which is clearly labeled as such to cater to customers who specifically wish to purchase it.

Sources:

• Tesco Halal Meat & Dairy
• Tesco Approach to Religious Slaughter and Animal Welfare

And Allah knows best.