Which makes the same error of over estimating the power of the BBC and establishment in influencing voting patterns as did the Remain and Clinton campaigns.
I should think it's quite easy to find evidence of anything you want to find in such research , so that probably says more about the professor himself than anything else.
It might be that some people will give it credibility because a professor produced it, but I'm afraid that fewer people these days automatically accept the word of academics because they've been caught out manipulating the facts for political or financial reasons so often.