It's been a few months since I flew BA and now I need to book a RT IAD-LHR on relatively short notice. I'm used to reviewing seat availability before selecting a flight so I can aim for less crowded flights. Now I get all the way to the payment page without seeing anything of the kind. What am I missing? Has something changed?

Several flights are saying 'Only 1 seat(s) left at this price, book now to avoid disappointment' and we're talking $10,000 for Club World! I know I can select (and pay up for) a seat after buying my ticket but that won't help me choose a less crowded flight.

PS: IIRC, we used to be able to click on the flight number to get this sort of information. Right?