Voting

[Cloverjo]

My son lives in London, and voted in the mayoral election recently, so he is obviously registered to vote in elections there.
He also has a postal vote from my home. I know he is only allowed one vote in any election, but I was wondering how would anyone know if he used both votes?
I'm not suggesting he would, just wondering how people could check these things.

[Peter Pedant]

yes

and they prosecute

you are allowed to registered in more than one place
but not to vote more than once

[Jackdaw33]

Not sure what the law is now, but 40 years ago, when I was at university, I was registered at both my home and my college. I could only vote at one place in a general election but could vote twice in a local election. I suspect that in a national referendum he will only be allowed one vote.