Re: How has he survived?
I do not have two degrees: I took the foundation exams (all of them) after a year in the profession and passed them first time. The QM course (and others that are considered equivalent to the foundations) is not taken by everyone: my firm (and others) favour the foundation exam route. I personally don't think the QM course is a great substitute for the foundations and learning on the job (but people have a tendency to defend what they did as 'correct' so I am probably biased).
People with a postgraduate law qualification are very much in the minority in my firm (of 50 plus attorneys). Doctorates are much more common (virtually required for biotech).
I don't know of any UK patent attorneys who started with law. Quite a few trademark attorneys go this route though.