I have to travel from Edinburgh to Belfast, and then Belfast back to London. But before that trip, I just applied for the Schengen Visa so my passport would be at the embassy, and I don't think I can get it back on time before my flights.
I am an international student from Thailand, on Tier4 visa. Am I allow to travel on that domestic route without my passport (I will fly with Flybe and Ryan air) ? Can I use my Biometric Residence Permit card instead?