Factual error: The naval captain in this episode has a military mustache as prescribed by army regulations. The Royal Navy regulations, however, prohibited separate mustaches and beards - if facial hair was worn, a "full set" of beard and mustache with the beard joined to the mustache was mandatory, and that to be grown to the commanding officer's satisfaction within six weeks.
Foyle's War (2002)
1 factual error in Casualties of War - chronological order
Starring: Michael Kitchen, Anthony Howell, Honeysuckle Weeks
Factual error: Foyle is subordinate to an Assistant Commissioner of the Metropolitan Police, but Hastings had its own force (merged with other Sussex forces 1943-47) and the Met had no jurisdiction outside London.
DCS Christopher Foyle: The uniform suits you.
Andrew Foyle: Thanks. I wish I could say the same about your dressing gown.
Trivia: The fuel station features metal miniblinds in several scenes. These did not become available until the early 1940s and would aluminium be diverted from airplane production to blinds?
Question: Why does Foyle wear an overcoat at all times of the year? I know that the English summer is temperate, but always a long, floppy overcoat?
Answer: He doesn't actually wear it all the time even in summer. In some episodes in the summer he simply wears his suit with jacket.