As the prince will only make a decision if the girls are brought to him before July, Harry decides to take advantage of a UNESCO offer to the British government, which will provide an expenses paid tour of various European cities that will end in Rome.

Shortly after the break-in, Harry and the students discover that the Ministry is sending in a new headmistress recruited from Australia, Dame Maud Hackshaw, who they suspect will withdraw their nomination.

During this time, Romney makes a play for Gates due to her cover story, but as they reach Rome, she admits the truth to him, revealing that she has discovered Mangan amongst the students.

As Prince Bruno announces his plans to marry Myrna, much to the annoyance of one of her sixth form classmates, St. Trinian's is given the reward for Mangan's capture, which Miss Fritton keeps for herself and the school upon her return.

[4] A leading model at the time, Sabrina got high billing, appearing in all the posters and publicity stills in school uniform, but she actually had a non-speaking part in which she was only required to lounge in bed reading a book while men hovered around her.

[7] Bosley Crowther wrote in The New York Times, "what is important and delightful is that the spirit of knockabout farce, evolved in "The Belles of St. Trinian's," is retained uninhibited in this film...it is wild but generally funny—explosively funny in spots, especially when that fellow Terry-Thomas, who was the mustachioed major in "Private's Progress," is dragooned as a bus driver to transport the girls to Rome.

"[8] More recently, David McGillivray noted in Time Out, "Inventive situations utilising a classic British blend of comedy and crime make it the best (if you like this sort of thing) in the series which followed The Belles of St Trinian's.