Armed Forces
People in the armed forces, and their spouses and civil partners, can register to vote as a Service Voter or an ordinary elector.
If you're based overseas, or expect to be posted abroad in the next year, register as a Service Voter. This allows you to be registered at a fixed address in the UK even if you move around. A Service Voter registration also lasts for five years so, once you're registered, you shouldn't have to worry about it whilst you're busy overseas.
Register to Vote as a Service Voter
If you are based in the UK and unlikely to be posted overseas or move address in the next year, register to vote as an ordinary elector.