Hi, I am looking to book a return trip using a companion voucher in J to Sydney at -355 days. I would like to do a stopover in SIN on the way out but am a bit stuck about the best way of doing this. If there is a link to a previous thread this would be v helpful

It seems that the SIN-SYD sectors get full at -356 days with people having booked the full LHR-SYD flight and therefore it seems v rare to find SIN-SYD availability. Does anyone have experience trying to book something similar to this?

could I perhaps book
DAY 1 LHR-SIN
DAY 2 LHR-SYD
and ask BA to remove the SIN-SYD sector from the second flight and apply the 241 voucher?

Any help would be hugely appreciated!