I live in Spain. The Brits over here (and there are a lot of them) are overwhelmingly Remainers because they don't want to lose all of the, ahem, benefits of being in the EU, mainly being able to use other EU countries like Spain as cheap retirement havens while still being able to get their "free" medical from the NHS. They would sell out their country in a hearbeat for that and most of them are older.
Ah. Makes sense.
Significant job losses in British workers in the Alpine ski industry etc, who under EU rules can be employed locally on short-term contracts while continuing to be employed and pay taxes in their home country.
British-run ski companies employing mainly British workers have a business model based on this system, and a number of them are closing. This is a significantly-sized industry: 6.3 million Brits ski in Europe annually, mostly on trips run by British companies.