Amber Rudd vented her frustration today over US leaks about details of the Manchester terror attacks.
The Home Secretary delivered a rare public rebuke to the American authorities by admitting she was 'irritated' by the way 'operational' information had been disclosed.
She said she had made 'very clear' to the US that such leaks 'cannot happen again'.
But the Cabinet minister's warning seems to have fallen on deaf ears - as both US and French officials have been revealing more details about the case.
And the New York Times published photographs of the crime scene - including close-ups of the killer's charred backpack, the detonator and the bolts and shrapnel he packed the bomb with.
Transatlantic security ties have been incredibly close for decades, with intelligence freely shared.