TL;DR: "Polling showed the areas that had the most to lose and the least to gain from the Brexit are precisely those where the referendum saw the most support. In other words, the places — the most export-heavy regions —most hurt by the economic disruptions caused by Brexit could be the places that pushed hardest for it..."
https://www.washingtonpost.com/news/wonk/wp/2016/06/25/why-p...
TL;DR: "Polling showed the areas that had the most to lose and the least to gain from the Brexit are precisely those where the referendum saw the most support. In other words, the places — the most export-heavy regions —most hurt by the economic disruptions caused by Brexit could be the places that pushed hardest for it..."