One of the requirements for applying for British citizenship through naturalization is:
During the last five years you must not have been outside the United Kingdom for more than 450 days (about 15 months);
How is that proven as an EU citizen? Does the government already automatically know how long you stayed in the UK for (using their airport records) if you're a EU student?
Or do you need to show your flight tickets?
Please explain to me how this process works exactly. Thanks!