Exclusive: The Traitors is all about backstabbing and accusations, but accusations of deception have now extended to the behind-the-scenes production of the hit show.

The BBC has been accused of painting a “truly shocking picture” when it comes to the number of people working on the show who are based in Scotland, which is where it is filmed and where it qualifies as a “Scottish commission” under Ofcom regulations.

The Traitors UK is made by Studio Lambert Scotland and is filmed at a castle in remote Inverness. However, veteran Scottish TV director Peter Strachan, who is on the board of trade body Director’s UK, has claimed the show could be failing on the Ofcom regulations. These regulations require producers to meet two of three criteria to qualify as out-of-London: having a “substantive base” in the region, investing 70% of “production spend” outside the English capital and having at least 50% of...