Yes, you should absolutely raise this at the airport. In fact, the contracted minimum wage employee you are likely to encounter there will not only perfectly understand the gravity of this issue, and sympathize with your inability to select United Kingdom. No, they will also be empowered to immediately change the mobile app to rectify this.

Further, I would expect that the chairman of Lufthansa Group will reach out to you personally to thank you for alerting them to this massive flaw, that must have prevented tens of thousands of BRITISH CITIZENS from checking in via the Lufthansa mobile app.



Now, back to real issues...