True, EU nationals resident in the UK do not get to vote in natiinal elections. (Apart from English, Scots, Welsh and Irish). Citizens of Commonwealth countries resident in the UK do get to vote in national elections. So long as people are 18 or more.

But in local elections all EU residents get to vote.

That's how it is. That's "the UK Electorate". Nothing particularly logical or consistent about that. Nothing set in stone. It will change when we leave the EU, because the EU residents, even if allowed to stay, will lose their vote in local elections.

I'd prefer the way they did it in Scotland for the independence referendum - everybody got to vote, from 16 up. I'd see that as a significantly more democratic electorate.

The vote was whether Britain should stay in the EU. Not allowing EU residents a say in that wasn't a matter of "of course". It was anti democratic and shameful. More so because all the parties colluded in it.