Thanks for advice. We've already got a J return booked for Jan (GLA-MEL) so I could try in Manage a Booking to go for a J to F upgrade on a sector it seems. I'll see how many miles it would cost for different options.

I'm not sure if there's 2 or 3 class between GLA and DXB but could try DXB-KUL; KUL-MEL on the way out and MEL-SIN, SIN-DXB on the way back.

For some reason we are only Blue now after being Silver but if travelling J I don't see any difference to us - we still get chaffeur pickup and lounge access as J pax irrespective of how many miles we have.

We have about 77,000 Skywards miles but only 22,500 tier miles presently with the 12,700 SM due to expire end of Oct. If we apply SM's to an upgrade this doesn't affect the TM's?

Probably the upgrades won't be available until closer to Jan departure though!!