Kemi Badenoch has opened the emergency debate on Keir Starmer's appointment of Peter Mandelson, declaring she "cannot overstate how serious a matter this is".
Mrs Badenoch told MPs: "The Prime Minister sent a known security risk to Washington to a position where he would see our most important allies' top secret intelligence.
"What if he had seen something and leaked it to one of our enemies? How much would that have damaged our security?"
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