Best of three?
Just one referendum and that's it is a bit of a shock. We need to get the hang of this voting marlarky - people are too used to thinking their vote won't count.
Should be a best of three -
The first referendum gets all the votes for people who care quite a lot about the issue.
The second one would encourage more people to vote who didn't quite care enough to vote the first time, but enough to be horrified about the result (and would probably push the vote the other way especially after having seen how close it was).
The third one is the one that counts, that would have everyone voting who wants a say in the future, and we have to stick with that result.