K Class upgrade chance?

Hi there,
What are my chances of getting my wife and I upgraded from our K class PE seats into something more... horizontal?
We're booked on VS200 on 14/02 and then after a stopover on the 20th.
The next fare up which, I think, would have no problem with an u/g was £700 more so we decided on the K class.
I also noticed a strange thing the cheapest fare to HKG on that day was £1100 whereas the trip to SYD came in at £880. If you wanted to go to HKG it'd be cheaper to buy a SYD ticket and just stay on.
Cheers,
Lou
What are my chances of getting my wife and I upgraded from our K class PE seats into something more... horizontal?
We're booked on VS200 on 14/02 and then after a stopover on the 20th.
The next fare up which, I think, would have no problem with an u/g was £700 more so we decided on the K class.
I also noticed a strange thing the cheapest fare to HKG on that day was £1100 whereas the trip to SYD came in at £880. If you wanted to go to HKG it'd be cheaper to buy a SYD ticket and just stay on.
Cheers,
Lou