I would assume the RE/EI interline agreement on the Cork-Dublin route would be extended to all regional airports in Ireland & Aer Arann services to the UK & France.
Have the facilities at DUB been upgraded and allow connections to domestic flights airside? When I connected from EI to KIR and NOC some time ago I could not do it airside.
Believe it or not the airway taking a lot of traffic originating in GLA/EDI/PIK/MAN/LPL/BLK etc down towards the Bay of Biscay passes overhead DUB and ORK
.
I know. That's why I mentioned flights to Spain. But I do not think that this a major market for a DUB-hub in times of the Ryanair's and Easyjet's that are serving each and every Spanish milk-can nonstop from UK regional airports .