This question already has an answer here:
I am traveling to London, UK (from Chicago, USA) by an Aer Lingus flight in about 2 weeks time. My first leg is Flight 122 from Chicago to Dublin and my second leg is Flight 154 from Dublin to London.
Both flights show as landing into and departing from Terminal 2 in Dublin. I am wondering if I have to go through passport control? The Dublin/T2 passport control does not provide info on this.
I ask because I am wondering if my visas are enough to do this "transit" in Dublin. I am an Indian citizen with an Indian passport, a US H1-B visa in my passport, a holder of a US green card AND a valid C type UK visitor visa valid until 2019.
I have read the following links on transit visas and the UK-Ireland visa:
Edit as to why this question is different:
Is Dublin - London treated as a domestic flight? If so, does passport control require me to have an Irish C visa, since Ireland is my first country of visit?