It's a distinction between form and content isn't it? If we pretend that the series 'Blakes 7' was a representation of a real world: is that world in any way distinctively 'British' ? That's a different question from saying, is the way that society is represented on TV distinctively British (video format, RADA accent, no natural ad breaks etc.).
Obviously there is quite a grey area though. For example (imagining still that it is real) the mere fact of picking particular events or characters from that reality to make into a story doesn't really fall into either of my nice distinctions. You could say 'well, the liberator crew aren't in any way british, but scripts which choose to concentrate on the times when they were bickering and complaining are distinctively british.'
I'd say the british features of B7 or the B7 universe are
- not very polished - full of sarcastic bastards - successfully or disastrously amateurish - cynicism and pessimism - camaraderie combined with isolation
My experiences on the HP Lovecraft list lead me to strongly question the belief (which I myself held until quite recently) that America has a more open class system than Britain. I think the system is different, but not more open.
Alison