The high court will hear a legal challenge to the EU referendum outcome in October. To my understanding, the premise of the legal challenge is that the referendum was never legally binding, only advisory. The claim is that in order for the government to trigger Article 50 a vote would need to take place in Parliament. Some commentators have expressed the view that the premise is precarious at best as the Prime Minister Theresa May can use historic Royal Prerogative powers to start the process of withdrawing from the EU without the need to consult Parliament. Others have also pointed out that the leaflet that the government spent £9 million on stated that the outcome of the referendum would be acted upon.
It is expected that the case will be appealed either way and one thing is for sure, it will be at the tax payers expense.