Given the negative comments from some on this work, I look forward to seeing their names in print soon on this topic.
I assume they can do better, and already have as long a list of publications to their name as does Prof. Dorling.
It is a tough call making information from data. Prof Dorling sets out his stall early on - he does numbers, not prose. He would therefore benefit from a better proof-reader and sense-maker. The production of the book seems to have been hurried too - there are errors, sometimes inverting sense.
As it doesn't spoon-feed you, you have to make a bit of an effort to get at what is being said, and of course it's repetitious, people aren't just old, they also live in the north or the south; immigration is not just into one place, and being born is not restricted geographically. I thought that was the point - there are divisions and discontinuities, but (as noted in the work) there are uniting elements too.
I found it interesting, with extensive references, something useful for anybody willing to delve further. Yes, it is left-leaning, but the evidence presented (and referenced from many official sources in both UK and overseas) suggests perhaps we are leaning too far to the right, and that deregulation has not delivered trickle-down, but has made possible "suck-up" of wealth. One reviewer notes that the book helps to "reaffirm your own saloon bar prejudices courtesy of a leftwing author" but fails to note the inequalities in income distribution which have developed since the mid 1970s. This isn't left wing bias, it is merely stating the evidence from various sources.
A worthwhile read, though it needs more polish to be acceptable to a wider audience.