And another one, sorry....
... If I book

Man - Sin - J
Sin - BNE - J
BNE - AKL - J
AKL- DXB - Y
DXB - Man - Y

£2990 1 Passengers, Multiple class, Skywards Flex / Saver Combo

Will I then be able to upgrade with ££££ the AKL - DXB sector because I want to book now but cannot afford to do the whole thing J at the moment, if I booked J all flights it's £4500 each

Also how many miles would I need for AKL - DXB Y - J as I may have enough by then?

THanks

JO[/I]