Thanks for all the useful info.

Hopefully I'll get a business trip where I can use up my comp. upgrades before they expire. I do have a AKL-YVR flight in Y+ later this year but 'Mrs RiskFate' is less than enthusiastic about the (unlikely) prospect of me being upgraded to BP and her being stuck in Y+. Yes, I did offer to pay for her upgrade, but I'm not sure if that will help. Will they see us both as having applied for upgrades and do both, instead of just one?