Grandpa Jim comments that his daughter Phyllis has progressed from dating "local lads" to "the United Nations." Interestingly, although the international organization with that name did not exist until two years after the film's release, the term "United Nations' was used to describe the allied forces arrayed against the Axis Powers. FDR used the term frequently.
The fourth cinematic appearance of Charters and Caldicott, played by Basil Radford and Naunton Wayne. They previously appeared in The Lady Vanishes (1938) and Night Train to Munich (1940), films also written by Sidney Gilliat and co-director Frank Launder. They also appeared in Crook's Tour (1940), which was adapted from a BBC Radio serial. Although this was their final appearance as Charters and Caldicott, Radford and Wayne appeared together as similar comic characters in other films, such as Passport to Pimlico (1949).
The film was passed for US release by the Production Code Administration on condition the word 'hell' be deleted throughout, but apparently this situation was never satisfactorily resolved and the film was never theatrically released in the USA.
The song sung at the wedding and in the closing scene of the film is called Waiting at the Church. It was a popular Music Hall song written for a well known (at the time) British Music Hall artist, Vesta Victoria (Victoria Lawrence). She also sang "Daddy Wouldn't Buy Me A Bowwow" also written especially for her. She became well known both sides of the pond, dying in the U.K. in 1951.
The performers at the review quote from stanza vi of Thomas Gray's "Ode on a Distant Prospect of Eton College" (written 1742): "Alas, regardless of their doom, / The little victims play! / No sense have they of ills to come, / Nor care beyond to-day."