NZ/QF (LHR vs Homebase)

[klinitco]

I just had a question, that may have been answered already, in which case I'm sorry for asking it AGAIN:

Is the SIN-FRA route done by LHR-based crew or Australian crew with QF, and if NZ launched a similar flight (which is a rumour circulating at a.net) who would be most likely to operate that flight? LHR or AKL crew?

A more QF-specific question, and I understand that some parts of it may be a little sensitive, but how do conditions and pay compare between Australia based and LHR crew? What routes would an eg SYD based newbie be most likely to end up with and how much would language skills affect the routes you get?

Thanks heaps, and I hope I'm not asking too long or common questions!