Originally Posted by
findark
If it's all one ticket, your bags will be checked through to EDI. DUB has not been part of the United Kingdom for quite some time, so it's not an I/D connection
True but Ireland is part of a Common Travel Area with the UK and hence flights from Eire arrive as domestic - no need for passports etc. If the connection were to France, for example, then it would be I/I, whereas this is treated as I/D.
Having said that I'm not familiar with the baggage arrangements so can't help the OP on his/her question.