I'm afraid no one with 2000 hours is going to get a command. To have 1000 PIC (on an Airbus) at 2000TT would be a statistical impossibility.
But that is not the requirement. "2000 hrs on jet transport greater than 25 tonnes" + "1 year BA experience". It doesn't specify PIC.
So assuming 200 hrs to get fATPL during training and then straight on to A320 with, say, Easyjet, before joining BA, you'd be looking at about 2200 hrs TT minimum for command.
The 1000 PIC is an alternative requirement. Thats how I read it anyway.