I have been trying to select seats for flights in December and also Jan 2017 for the past 3 days but keep getting the 'Sorry, our systems are not responding ..." etc etc response. Is this happening to anyone else? Does anyone know if there is some kind of technical problem with the BA website I don't know about? If so, I wish they would post a notice about it.

I will have to give up and ring them up tomorrow. I don't want to end up with the seat nearest the loos on a long haul!