Not of the total electorate almost 30% did not vote passing major constitutional changes on such a small majority is counter to all custom and practice - A local Allotment society would not pass a rule change like this.
Not holding stupid, vague referendums with a mere 50% majority requirement, instead of a supermajority, that can trigger major, complex constitutional changes would be a start.
The rest of the people knew about this vote and they didn't care enough to vote. What are we supposed to do about that? Should we force everybody to vote?
https://en.wikipedia.org/wiki/Results_of_the_United_Kingdom_...