That’s a really interesting link, thanks. The number 2 reason was immigration. I can see that it might be possible that immigration is a subset of “decisions about the UK should be taken in the UK”. I.e. the immigration policy shouldn’t be set by the EU.

It also suggests that leave voter see multiculturalism, feminism, the Green movement, globalisation and immigration as negatives (80%). Overall I see this as supporting the notion that the leave vote was anti-immigration, perhaps as part of a wider distrust of outside influences.

Anti-immigration sentiment in the UK is to a large extent driven by lagging infrastructure.

As just a single example the housebuilding industry has been consistently able to build fewer houses than there are people arriving by a large number, and the statistics over how many people are arriving are themselves deeply suspect - they don't correlate with any other population related statistics, and are based on airport surveys that ask a subset of people whether they plan to stay for a long period.

If politicians allow immigration at levels significantly above the speed at which infrastructure can be built out to support the new people then infrastructure reliability and availability will decline. It is reasonable to be concerned about that if you rely on that infrastructure.

The idea of Brexit voters as incorrigible racists isn't supportable, no datasets of any integrity show that and the brief spike of "omg britain is so racist" died down very quickly after the referendum, simply because the UK is and remains by far the most racially diverse nation in Europe.