I assume most people here already are registered but just in case: here’s the link.
Yeah we dont have that. Voter registration is the closest we have. Qnd you need to donit every time you move house.
National Insurence IDs are issued at 16 and the gov dose try to keep track on working addresses etc.
But voting is handled by local authorities so you need to inform your authority when you move to an area. If you want them to include you in the voting role. Many forget until an election is due. And some choose not to bother.