Tesco says introducing DNA testing of its meat products will be "a significant investment for Tesco, borne by Tesco."
What about the Food Standards Agency doing some? Should it be at the discretion of retailers?
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The Islamic centre where the Manchester suicide bomber is thought to have prayed says the attack "has no place in Islam or any religion".
German chancellor Angela Merkel and Indian prime minister Narendra Modi among those to praise "great spirit" of Manchester people.
The bomber's identity has been confirmed by Greater Manchester Police.