I got a lift into dublin by a local pilot
What this 26 August last year? I seem to remember the three guys who I gave a lift to that day were from Gamston.
Have a look here for a guide to flying in Ireland.
Flying In Ireland
Form wise you need:
1. GAR to Special Branch and Customs in UK. (There is now an online form on AOPA UK and Android and iOS apps for this).
2. A Flight Plan
3. International Flight Notification (On the Weston website) that needs to go to Weston and Irish Customs.
Please note that the airspace around Dublin over the Irish Sea recently changed. It's not on the current Irish chart (no idea about the CAA chart).
You can see it here at appendix 3
AIC
Here is the structure