Re: at a democratic decision
"If so whose votes were suppressed?"
Try any British citizen who has been living in the EU for long enough that the arbitrary "you no longer count" rule kicks in. The one that successive PMs say they'll get rid of, yet never manage to do.
Why don't we count? Because apparently the whole issue of the UK's relationship with the EU simply has nothing to do with UK citizens living in the EU. Huh? That argument doesn't hold air, never mind water.
Or, another way to look at it, a clever yet slimy way to discount the people who took benefit of their EU rights and are thus more likely to vote in favour of the EU because they actually understand what it means.
And that's not even getting into the shit that the Brexiteers pulled around and especially following the referendum, as detailed above.