@Olivier5,
Olivier5 wrote:I think this is simply because most UK politicians agree that the referendum is binding.
Actually, parliament is sovereign and referendums are generally not binding in the UK. (At least not in a legal and constitutional sense.)
The exception was the 2011 referendum on changing the electoral system to alternative vote, where the relevant legislation obligated the government to change the law to reflect a “yes” vote had that occurred.
The European Union Referendum Act 2015 – the law that allowed the referendum to take place – didn’t specify what would happen in the event of a vote to leave.
The House of Lords Constitution Committee explained in a 2010 report why that’s the case. It said "because of the sovereignty of Parliament, referendums cannot be legally binding in the UK, and are therefore advisory". (
Source)
However, political reality is very different. The above sourced House of Lords report that said referendums were not legally binding, the committee concluded that "it would be difficult for Parliament to ignore a decisive expression of public opinion".