A border in the Irish Sea would open a massive can of worms resulting in restriction of freedom of movement between different parts of the UK, which I think I might countenance if London could have a hard border with the rest of UK in exchange with staying in the customs union.

The only realistic solutions therefore would be to make NI a sovereign state, unite NI with the rest of Ireland, conclude that leaving EU is impossible, or commit economic and social suicide by just going over the cliff edge.

Sometimes I wonder if we agreed in a referendum to put rat poison in school meals then those who voted for it would refuse to back down from the decision if an expert inconveniently was to point out that this would result in millions of dead school children.

Being in government must entail working in the best interests of the population,(I would go further thatgovernments collectively should be working for the best interests of humanity) not in the interests of appeasing those who may withdraw their vote for a political party if they don't get their own way.