1. 52:48 is far too close to apply to a permanent constitutional change - but Cameron was either too stupid, too party political, or too in thrall to the `Euroseptics to apply the normal requirements for referenda. They are NOT general Elections which only apply for a maximum 5 years.
2. An EU judge has ruled that Article 50 is reversible and will cancel Brexit, provided it's not done for flippant, temporary or 'advantage in trade talks' reasons.