@paradyning and @beanaseireann, I think the scuttlebutt at the time was that William and he didn't get on, for whatever that is worth.
My suspicions, such as they are, are based on nothing more than finding it coincidental that a young woman and a man are in a relationship for a decade. It ends quite suddenly once she is more easily able to marry - and the man is quickly engaged and then married to another woman within a year or two.
Perhaps "suspicions" was the wrong word. Maybe it's just interesting timing.
Anyway, congrats to Bea now - I hope she has whatever wedding she wants, and a long and happy marriage.