Basically he qualified for England, realised he wasn't good enough so went back and re-qualified for Ireland. Ed Joyce did the same thing, and unless his form imporoves Eoin Morgan may be doing the same before long!
Hmmm....we have a 'special' relationship with Irish born players, there's no test cricket they can play so it's associate rules which enable them to play for us. And yes almost all of them have returned to play for Ireland once the chance is Test cricket slips away. Morgan of course is England captain so there's more of an incentive to play for us...and who knows his Test career may start again.. unlikely I know..but possible.
Plus how far would Ireland get in a World tournament?
He's not English thou...and we know that, he doesn't sing our national anthem, presume that didn't escape anyone's notice !
You can't blame the bloke, he plays for England but he's Irish..