Originally Posted by ReluctantCanadian
Thanks, everyone, for the helpful replies. I guess the decision I have to make is whether I want to be more comfortable this year, which means flying BA from YVR, or make SE for next year...
Should you find BA Club more comfortable than AC, you can purchase a WT+ ticket and upgrade using your BA miles to Club for 25,000 miles return between Canada/US and UK.
BA usually have promos that on a full J fare they will upgrade you to First on one leg, and give you the full tier points and cabin bonus miles of flying First on that leg. A good travel agent should be able to arrange that for you.