Carnforth station was chosen partly because it was so far from the South East of England that it would receive sufficient warning of an air-raid attack that there would be time to turn out the filming lights to comply with wartime blackout restrictions.
The screenplay was adapted and based on Noel Coward's 1935 short one-act (half-hour) stage play "Still Life". It was expanded from five short scenes in a train station (the refreshment tea room of Milford Junction Station) to include action in other settings (Laura's house, the apartment of the Dr.Harvey's friend, restaurants, parks, train compartments, shops, a car, a boating lake and at the cinema),
Laura borrows books from the Boots Lending Library. Such Lending Libraries were an offshoot of Boots Pharmacies. Boots is a major pharmacy chain in the UK. It was founded in 1849 and still exists, although in a much different, more diversified form. The Lending Libraries were started in 1898.
The poem that Fred asks Laura's assistance with is by John Keats, "When I Have Fears That I May Cease to Be", the actual quote being 'When I behold, upon the night's starr'd face, Huge cloudy symbols of a high Romance ....'.
The original Broadway production was presented as the one act play "Still Life" as part of the repertory presentation "Tonight at 8:30" that opened at the National Theatre on November 24, 1936 and ran for 118 performances with a cast that included Noel Coward and Gertrude Lawrence.
On her first trip to Milford after meeting Dr. Harvey, Laura walks past a bookstore window. On display are a range of books published in 1944/45, including "Something in my Heart" by Walter Greenwood, "A Showman Goes East" by Carroll Levis, "The End of the Mildew Gang" by S. Fowler Wright, "Capri Moon" by Kelman Dalgety Frost, "Winter's Tales" by Karen Blixen, "Triple Mirror" by Kathleen Wallace, "Once a Jolly Swagman" by Montagu Slater, and "Grand Barrage" by Gun Buster (aka John Charles Austin).
Old Arabic Love Poem on Persian Rug: when Laura comes to see Alec at his friend's flat, there is a Middle Eastern rug hung on the wall. The style of the rug itself confirms it is Persian, however, the beautiful calligraphy is Arabic. It is from a 9th century love poem by the Arab poet Ali Bin Salwa Al-qusari. it reads from right-hand corner of the rug and going anti-clockwise: The Utterance of Passion - In My Eye - Speaks To You.