The Captain's desire to go to Norway (he asks the cannibal chief for directions) is much more likely to have been an in-joke rather than a random choice; in real life, Will Hay separated from his wife in 1935 and was romantically linked to a Norwegian woman called Randi Kopstadt. In consequence, he visited Norway frequently, learned Norwegian and kept a boat on the Oslo Fjord.
Harbottle refers to the Crystal Palace in south London when he sees flares being sent up into the sky (mistaking them for fireworks). The reference is unintentionally ironic in view of the fact that the Crystal Palace structure burned to the ground on the 30th of November 1936 just days before this film was released in December of the same year.
The first of six comedies to feature Will Hay with his most famous sidekicks, played by Moore Marriott and Graham Moffatt.