I have been considering a 2016 trip to England and my initial idea was to simply fly into Gatwick, and then travel to Telford/Ironbridge Gorge, York, and then London and flying back from Gatwick.
However, each of the flights I have researched stop over in Dublin before continuing to London. It would be ashame to travel through Dublin without visiting. So I am now thinking I could spend a few days in Dublin, take the ferry to Holyhead and then the train to Telford, York and finish in London. From London, I could either fly out from Gatwick or go back to Dublin via Holyhead.
Speed of travel isnt so important, trains and ferries would be more interesting, and I get a tiny little bit of Ireland and Wales in this way. But is it a reasonable plan? And what should I expect at customs/border in Dublin and Holyhead?