Janet is a journo, and if anyone knows facts, it will be her. I used to occasionally drink in a pub near fleet street and the stories you would hear! They can't publish them, but it doesn't stop them telling all and sundry when they've had a few sherries. I bet she's heard something through the grapevine.
That said, I hope she is wrong. Those kiddies have no business being anywhere near KP, let alone on overnights. If they were mine, she would be lucky to see them in a contact centre. Could you imagine what would happen if one of them found a bag of coke and mistook it for sherbet? Look at what happened with Sadie Frost's daughter Iris Law when she took an ecstasy pill as a kid at Soho House! Really winds me up.