Originally Posted by
UnderneathTheRadar
I think you're misunderstanding what happened when. The maps were uploaded at LHR by gingers who possibly never looked right when getting on and so didn't notice the J config (didn't even notice they were on a A318). The euro maps got them happily to EINN when the crew noticed the wrong maps - it wasn't ground crew at EINN who uploaded the wrong maps.
As I say, I don't have a great understanding of what went on. Just found it surprising that this confusion " apparently " occurred. Thanks for the explanation. I know a little bit more, now !