Jenny Kaye asked:
Isn't social rank in the Federation (Alpha, Beta etc.) exam-determined?
I don't think canon gives a very clear explanation of this, but I think exam-determination is common fanon. Personally I think that rank is primarily hereditary, with limited opportunities for promotion through exams (and much greater potential for demotion!)
And the crew of the London sounded dead posh.
Actually there's a lot of Received Pronunciation going on-- Travis II is about the only person who sounds really downmarket. Soolin sounds like they had a branch of Cheltenham Ladies College on GP.
-(Y)