Hi everyone - just booked SFO-LHR-SFO using miles and I'm wondering if trying to upgrade to WT+ is worth it? Flights BA284 and BA287 on a 747. I can either use miles (maybe cash if the ticket lets me)...or maybe if the flight is pretty booked they'll just bump me up?

I used to fly from the US to the Middle East a few times a year and they sometimes bumped us up to WT+ (although most of the time there were very few people in WT so we just took the whole row). Haven't done that in a year or two so wondering if the chances are the same now?

Thanks!