That film has attracted a lot of criticism for not mentioning important players.   The French are angry that they do not get enough credit for holding back the Germans to allow the Brits to evacuate,  the Indians are miffed that there is no mention of a number of Indian sailors who commanded some of the small boats,  and now we have a Canadian who clearly should have been recognized.   At least the film makers did not make it look like the Americans saved the day.