Just had flight change notifications via the Myflights app for my various Summer 2015 flights. BA have firmed up the schedule from the generic A319 type to show if it is a A319 or A320.

I've managed to reserve the exit row 12 on my A320 flights. If you have any upcoming flights for the S15 season , it might be a good time to log on to BA.com and try and reserve the only good seats left since the refit began.