> Not all (or even, I would wager, most) were anti-immigration working class voters.

If you re-read the above you'll see that I didn't claim to have data on the matter. I'm perfectly open to the idea that a large share of the leave vote is anti-immigration (although that sentiment itself has a broad range of meanings from intolerant to reasoned), but my point was to highlight the perception of leave voters as being generally xenophobic members of the working class as being inaccurate or at the very least, a broad stroke of the brush. Through discussing the vote with the other leavers I know, not once was immigration mentioned as a concern, and we all work in average-to-senior software roles, not Dave the van man who rants about Polish people coming for his job.