There is really no English national dress. Some have put forth the attire worn by Morris dancers, but it is only worn by them and no-one else, and only worn for that purpose. I did a bit of that a long time ago, but had to quit for lack of time to devote to it. Get a little out of sync in some of those dances and you can accidentally smack eachother across the knuckles with big sticks, LOL!

As for Irish national dress, although worn by few, it is the kilt. Those who decided on that were Irish nationalists a little over a century ago, and really they specified solid colour kilts to distinguish from the Scots, which means that strictly speaking, kilts in Irish tartans are all incorrect! To say that it was not adopted by the Irish government is disingenuous, as Ireland did not have independence at that time, which was really the whole point. OTOH, if you were to point out that my ancestors left Ireland before that, and so none of them ever wore the kilt, I would have to admit you'd be right.