Open University in two subjects. When you pass courses etc.. they give you credits, enough credits gives you a degree. My credits built up from my first employer at an accountancy firm (AAT), then I did a mix of geology and psychology courses with the OU at my expense. You don't have to do a full blown one subject.
In observation, without doing a study, I would guess 60% to 70% of those with degrees gives them a sense of aloofness. The profession that produces the worst personality is teaching, imo.