I'm not sure that's a valid conclusion based on the layout of Dublin. The BA is on stand 20something, the ATR is on 125 and I think the Ryanair is going to 200. That means the Ryanair is only going to pass behind the BA about 10 seconds before he passes behind the ATR. When the ATR gets his conditional push clearance he is still waiting for the Ryanair to pass behind. It's entirely plausible that the BA is still then waiting for the Ryanair to pass behind. There's only two minutes between the ATR getting his push clearance and the BA stopping. Add a minute for the Ryanair to pass behind the BA and you can easily get two aircraft pushing within the space of a minute, with a clear statement from the controller that the ATR was supposed to give way to the BA in the subsequent dialogue.