Hugh Bonneville and Sally Hawkins plays husband and wives in this film. Following this collaboration, they quickly re-teamed to portray another married couple in an episode of The Hollow Crown (2012).
Paddington rips the corner off a phone book page. After attempting to sellotape the corner back on, a few seconds later the page is intact with no sign of rip or sellotape.
When Paddington is a stowaway in the lifeboat, his only suitcase opens to show 15 jars of marmalade. After the second cut of the discard pile, there are considerably more than 15 empty jars.
Aunt Lucy: Long ago, people in England sent their children by train with labels around their necks, so they could be taken care of by complete strangers in the country side where it was safe. They will not have forgotten how to treat strangers.