Originally Posted by
tometoyou
I think I will probably join one world, plus can transfer my Amex points to avios points, can always aim for the lifetime points, even if I do only reach it when on my death bed

You do not join Oneworld, but an airline ffp.
Living in UK BA is a good starting point. BA is a member of the Oneworld alliance
But with BAEC you cannot get ff mikes from your Air NZ (Star Alliance) flight.
You will need to join a Star Airline. Note that some cheap Air NZ tickets are nil earning with other Star airlines and some times with Air NZ (no ff miles/points)
FFP's can be very different
http://www.flyertalk.com/forum/infor...help-here.html