The Wiki explanation for the honorary/“fake” masters thing is probably the best, tbh:
“In the universities of
Oxford,
Cambridge, and
Dublin,
Bachelors of Arts are promoted to the
degree of
Master of Arts or
Master in Arts (
MA) on application after six or seven years' seniority as members of the university (including years as an
undergraduate). It is an academic rank indicating seniority, and not an additional postgraduate qualification, and within the universities there are in fact no postgraduate degrees which result in the postnominals 'MA'.”
This is why the degree Ruby’s doing is actually MSt (not MA) and the parallel course at Cambridge is MPhil. But they are similar to MA courses at other universities. The nine-month length does make these ones very condensed and intensive, though.