But for Brexit the pro-EU side obviously didn't have the heft of the Establishment behind them either, or why was there no confirmatory Brexit vote? Either way

But for Brexit the pro-EU side obviously didn't have the heft of the Establishment behind them either, or why was there no confirmatory Brexit vote? Either way, of course you won't find counter-examples if you conveniently define things so the requests made by the anti-EU side simply don't count.