LHR-SIN-MEL economy W fare £1431 round trip, 2 pax, March 2023
LHR-SIN - offered premium economy (£414) and business upgrade (ca. £1000)
SIN-MEL - offered premium economy
Took premium economy for the first leg - be warned that most likely you will end up in a middle seat and separated from your travelling party. You cannot see the available seats until after you have paid (with no refunds), and go to Manage My Booking.
Priority checkin (separate premium economy line) and extra luggage at LHR. No lounge access.
No upgrades offered on the return - we had an empty seat between us SIN-MEL and crazy full A380 back to London.