'realpolitik' (a system of politics or principles based on practical rather than moral or ideological considerations.)

No leader of ANY mainstream political party in the UK, OR in Europe though for one nano-second that the electorate of the UK would vote LEAVE - that was the reality when any of them talked about a referendum.

The Conservatives honoured their pledge to the electorate of the UK and held a referendum fully expected the "Remain" side to win - IT DIDN'T - "realpolitik" is for the politicians in the UK to recognise the declared will of the electorate of the UK and deliver what they voted for as rapidly as possible by securing the best deal possible that works to the best advantage of the UK.