You’re right Piggy, the English are frequently clueless about the Scottish class system and some Scots have even been known to use that to their advantage. When Susan Calman was a regular on the News Quiz on Radio 4 it was hosted by Miles Jupp, who is everyone’s idea of posh, and they frequently played the roles of Glaswegian commoner vs Southern toff for comic effect. One day however she told him not to patronise her just because she was common and he shot back, “well no, if I was going to do that to anyone it certainly wouldn’t be the privately educated daughter of a knight of the realm”. 
Only slightly OT because there is a Strictly link: I certainly don’t recall when Susan’s lovely old mum and dad were shown watching her at home in Glasgow that he was introduced with his title (gained for meritorious service as Scotland’s First Medical Officer to be fair, not inherited, but still not the impression you’d have got from watching her VTs on Strictly).