I am from Georgia and have a D category long-term Schengen visa but is marked 01 which means that it's a single entry. Am I able to go from Poland to France by plane?
I asked this question and I was given an answer that I can, but my friends with the same visa had a problem. They used it transit Spain en route to the UK, but they were refused entry at the UK border.
Can I travel or not? I have already the tickets to France and do not want to be refused entry.