When Richard Todd is dancing with Lucille, the right shoulder strap of her dress comes off, but when they are kissing, the strap is back on her shoulder again.
When Richard Todd gets splashed with the water from the bath, the amount of water on his suit increases dramatically when he exits the room.
Although Bill Ferguson's (Richard Todd) travel agency and apartment are located in Edinburgh, Scotland, his white Jaguar XK150 carries the number plate, VUL 867, which is a central London registration. Similarly, the Rolls Royce taxi (yes, there were Rolls Royce taxis in Edinburgh in the 1950s and later) carries the number plate NDP 63, which indicates it was registered in Reading in Berkshire in the Thames Valley, in south east England.
The story is mainly set in Edinburgh, but some of the scenes were filmed in London or its vicinity. Many of the buildings in Edinburgh are built from sandstone which weather to a dark grey colour. The shots in London can be recognised by the buildings of dark grey-brown brick.