Though Tyson is aware that it’s utterly hypocritical given his upper-class upbringing, in attending Cambridge International School and Cambridge University, his hatred of Etonians and Oxford University remains.
It’s an old resentment ingrained into his being for the family legacy at Cambridge and a learnt distaste for the upper class. However, where his distaste for Oxford goes into a ‘school rivalry’ category, Tyson actively resents Eton and on principle distrusts anyone who attended there.
That Sebastian Moran attended has been a point of contention between the pair, whereas Cambridge versus Oxford was a source of teasing between them.