Aunt Agatha sees off Cyril Bassington-Bassington from Southampton Docks. The Ocean Terminal Building was not opened until 1950. Also, the ship changes from a Cunard liner to a French one by the time he arrives in New York.
On the map of the USA showing the path of Cyril's touring show, they get to Tallahassee, Florida and the next town listed is "Pensacola, Alabama". Pensacola is in Florida, albeit very close to the Alabama border. The person in charge of graphics may have misread a US map.