Expertflyer doesn't seem to want me to sign up at present so all I can get is one seat map request.

Tonight's LHR-SIN BA11 flight.

Seat map shows 1 seat blocked in WT+.
3 blocked in CW
F occupied completely.

Does this match returned results?
(Had a quick look on BA.com and they weren't willing to sell any more WT+ or F seats earlier).

Not sure if it's just people that haven't checked in yet or they're being held back in case of last minute bookings etc.