I assume most people here already are registered but just in case: here’s the link.
Is there any harm in re-registering? I should be registered, but didn’t get a polling card for the police commissioner vote a few weeks ago.
Nope, no harm at all. It’s probably worth doing just to make sure they do have your current address down right!
You should still always try and vote anyway. I didn’t get my polling card for the council/mayoral elections this month but I was registered and allowed to vote.