Posted this on an isolated regimental thread last year, but re-posted for visibility now. For a wider perspective this new book may be of interest: 'Anatomy of a Campaign: The British Fiasco in Norway, 1940' by retired General John Kiszely. From Cambridge Military Histories and was published in April 2017. See: Anatomy of a Campaign: The British Fiasco in Norway, 1940 (Cambridge Military Histories): Amazon.co.uk: John Kiszely: 9781107194595: Books
Citing in part Harry Ree's comment on 4/10/2019: The wonders of YouTube refer to shots being fired by Some Danish troops and a modern film 'The 9. April', which is available via Netflix (subscription req'd). Short six minute clip: and one with English sub-titles for another skirmish: The film's official trailer: and the IMDB review has this in the comments: See:9. april (2015) - IMDb