I recently turned left for the first time, oh my was it brilliant 
I actually enjoyed the flight!
I fancy going to Japan next year in July. But would consider elsewhere if flighte reasonable.
What’s the cheapest way to get Business Class flights?
Do I book say BA direct and then upgrade beforehand or at the airport?
Book a random airline indirect and see if I can upgrade?
Or monitor prices for months and wait until a bargain pops up?
This year I upgraded online and then at the airport and it cost me ~£400-500 each way.