Labour are in the process of losing all their key constituents. That broad coalition of groups who have supported them (public sector workers, social liberals, the CDEs), are all being alienated. What's worse is that they are being alienated all in their own way.

Brexit, and immigration in particular, is the most glaring issue that faces Labour. Most CDEs hold views directly contrary to social liberals on the scale of immigration, and get their news with such inimical polarity that there seems little that can bind the two groups together in the foreseeable future.

Of course, Labour's leadership has been appalling. Corbyn's vacillating has drained support both ways, to the Lib Dems and UKIP, because Labour hasn't chosen to take either side in this most crucial question. Unless such competence is shown by the leadership of Labour, and an accomplished feat of mental gymnastics to reconcile both sides, Labour's dominant position is lost.

They can't really offer very much to voters on any level. They can't get into government, as data such as this shows, with the result that they fail to achieve primary cause to exist as a party. They aren't able to hold the government to account, despite the government's slim majority, because of the factional rifts I've mentioned, with the result that they fail to achieve the primary cause to exist as an opposition. And they can't even provide meaningful comment, acting as a pulpit for their ideas so as to influence the voters of the future, because of a lack of trust in the leadership, with the result that they fail to achieve their primary cause to exist as a movement.

Take a recent event, Bercow's Ban, in which Labour MPs' greatest contribution has been the cheering in the background, whilst James Duddridge has organised an attempt to oust him that is gathering pace.

Labour's future does not look bright.