A stunt in the first episode of a new BBC series is stirring a war of words between security services in the UK and the USA.
Series seven of the popular Hustle opened on Friday night with the heroes - a group of loveable con artists - coming to the aid of a friend's aspiring model neice.
The 'sting' involved the team establishing an office in the US Embassy in Grosvenor Square where they collected brown envelopes filled with cash from a series of 'marks.'
A UK security insider told us: "This is incredible. The ease with which Stroller, Stone Morgan and co just persuaded a receptionist to let them in is really very worrying.
"And how they managed to walk in and set up an office with no-one asking any questions begs serious questions about the US's security functions.
"As soon as the show aired senior personnel from my department were on the phone to their US counterparts to complain in the strongest possible terms.
"Further representations are to be made at ministerial level and the US ambassador will be summoned to Downing Street.
"You can't go to any US airport or tourist attraction without enduring horrendous security measures, but it seems anyone can simply waltz into their London embassy without so much as a by your leave."
As the row burst, BBC staff were working tirelessly through the night to secure the appearance of Hustle star, Kelly Adams, on this morning's edition of the popular cooking show Saturday Kitchen.
It was feared that she and the rest of the cast would be held for questioning by US security personnel. But she was on set as the show began at 10am preparing to face her food heaven (apples) or hell (celeriac).