How can I prove that I'm a British citizen if my passport runs out?
Unless you plan on flying anywhere you don't need a passport. Your driving licence is good enough for use on the mainland. I have never had to prove the fact that I'm a British Citizen in all my adult years. I simply tick the appropriate box. IMHO HM Government should take another look at providing ID cards for those of us who feel there is a need amongst certain groups. D