Seats 18A and C has the great recline, both together and went back at least 160-170 degrees, all the others I played with around it were standard of 130 or 120%. Only on the IAD aircraft though. Even those in the back row with bags of room behind them don't recline anywhere near the rear bulkhead.

Check in is in zone K I think. The very last one. At IAD it is round the back from the BA check-in. Limited signage too!