The media and the press have bashed us with endless sequences of statistics and figures about the loss of fee revenues and research funding universities would incur as the result of a Brexit. There is no doubt that this is a real threat for the health of the British Higher Education system, but when thinking education we should not focus exclusively on money matters: quality is the real concern. I am an immigrant academic, who had to compete to secure an academic job in the UK. More than that, I am the teacher of a large and internationally diverse group of students, and I can appreciate the benefits of working in an internationalised campus environment. In this post I will argue that competition among academics, and diversity within the student population, are the key determinants of quality and excellence of the British Higher Education system. Brexit is a threat to such excellence, and here are the reasons why.