Thanks,
Unfortunately the seats from Singapore to Helsinki disappeared (2 out of 4 remaining), so we've now booked
Syd-Sin Day 1 (QF1) overnight sleep
Sin-BKK (Jetstar paid) 6 hour layover BKK-HEL
Then returning
LHR-HEL-SIn
Sin-Syd on only 2 hour stopover;
The HEL-Sin leg disappeared between finalising itinterary and buying 5 hours later so lost the 24 hour stopover.
Now waiting for Emirates availability to come through in a month or so and hopefully go LON-DXB-Sin