An O level is an O level, one of mine was an E I think. O level = A-C GCSE. In any case thats not the point, secondary education was available and free to all in 1962, which is about when I went to school. If people despite that did not get the grades, thats nobody's fault but their own. And it is people who have not put in the effort to get anywhere in life, and are now casting around for someone else to blame, who are likely to have voted for brexit.