If you have another hour or so, this publication from the Social Market Foundation is worth reading (you'll have to click on the box in the top right hand corner for the full publication).
www.smf.co.uk/publications/dead-centre-redefining-the-centre-of-british-politics/
What it's saying is that political values can no longer be described in terms of left and right only.
It also claims that most people describe their values as somewhere in the centre.
However, these values aren't represented by the current state of political parties.
It claims that almost half of people are happy to be represented by the Conservatives or UKIP, especially as some centrists see Theresa May as a centrist politician. If UKIP continues to attract former Conservative voters, some in the centre will be put off. However, if UKIP succeeds in attracting former Labour voters, the centrists are more likely to stick with the Conservatives, because they don't like extremists.
The problem with politics to the left of centre is that it's fragmented. In England, the three main parties representing left of centre politics are Labour, the LibDems and the Greens. As we know, the Labour Party is itself fragmented with dividing lines between Leave and Remain (the main issue being immigration) and age. Younger members are less likely to be bothered about immigration and nationalism.
Unless left of centre parties can come to some kind of agreement, they're unlikely to win a majority, especially in a FPTP system. They're also highly unlikely to pull some of the 'centrists' away from the Conservatives if these people view the 'left' as extreme.
Frankly, the current system isn't representing the consensus, which is why I think there will be some kind of realignment in the future. It might have already started. The LDs are generally doing well in local elections and the Greens won a council seat from UKIP in the Forest of Dean. However, it's going to be a long road.