I’ve flown many times, DUB-LCY was the first flight, only issue was getting my hire car. The Polish chap said the license (paper one) was for a man. I told it was me…take a good look.

I’ve done quite a few German cities and also into Switzerland so have done passport control.
The easyJet stewardess did a double take at the gate though.

I’ve also done a Ferry to France and also to Holland. Have also done Eurostar too.
The only issue I’ve found is my luggage is always mega heavy and hard work.