you asked a "simple question" about if you needed a visa, and the answer can only be accurate IF people know what passport you hold. You wasted time arguing and being abusive rather than just saying. FYI just because you were flying from Scotland, does not mean you have a UK passport. Perhaps next time you need advice and people ask you to clarify something, just give them the answer. That will enabled them to give you the correct info.
Stuart is one of the smartest guys on here i.e an expert. Can't get more intelligent than that. Meanwhile everyone will guess what passport you're on so you get correct info.