Brexit: How Europe does second referendums
Another week goes by, and there's more Brexit confusion, and heightened calls for a second referendum.
Prime Minister Theresa May has warned such a vote would "break faith with the British people", but campaigners argue it may be the only way to solve the deadlock which is currently gripping Parliament.
Is it right to ask voters to take a view on the same issue more than once? If so, what circumstances should be proffered as a reason? And do people really change their minds in a matter of months - with a slight adjustment of terms, or a little more information - or does it take years and a substantial shift in culture or demographics?
A few countries in Europe have had that experience when a first referendum on a European Union issue didn't quite go the way the government of the day expected.
So what did these countries do - and can the UK learn anything from its neighbours?
Ireland - unlike all other members of the EU - is legally obliged to put treaties to a vote before they can be implemented because they need to change their written constitution.
But because EU treaties have to be unanimous, a "no" vote also means the treaty cannot take effect anywhere else, which throws a bit of a spanner in the works.
What were they deciding?
Irish voters have twice rejected EU treaties.
In 2001, it was the Treaty of Nice - which amended the Maastricht Treaty and sought to prepare the institutions of the EU for its anticipated enlargement.