This is not a national flag and its use by citizens and corporate bodies is entirely wrong.
Gold, with a red rampant lion and royal tressure, it is the Scottish Royal banner, and its correct use is restricted to only a few Great Officers who officially represent The Sovereign, including;
Its use by other, non-authorised persons is an offence under the Act of Parliament 1672 cap. 47 and 30 & 31 Vict. cap. 17.