I live and work in Austria. I need to travel from Austria to England for a meeting (and come back). However, my Austrian residence permit will expire during my stay in England. I will apply for an extension of my residence permit well in advance, but from my previous experience, I will not be allowed to collect my new residence permit before the old one expires.
Will this cause any trouble to my journey in any way? In particular, will I be refused to board either of the flights? And will I be denied entry to England or Austria? If this situation turns out to be problematic, then is there a solution to the problems?
In case it matters, my passport allows me to stay in the EU visa-free for 90 days, and it is likely that by the time I travel to England, I will have a notification letter (in German) from the Austrian authorities stating that the extension of my residence permit is approved.
It would be great if there are websites of authorities that I can show the airline/immigration officer in case of an argument.