Well.....I made use of my Virgin miles during their flash sale.

Using some miles (I only had 40k) and buying some additional during the 25% extra offer, I got 2 return tickets (PVG>LHR) outbound in premium economy and return in upper class for £2400 total.

Pretty happy with that.

I guess I'll just burn the Emirates ones on Business to First upgrades when available on my business flights. They don't expire until 2017 anyway.

Thanks for the help