Ireland England and Scotland in two weeks

Well, in my opinion, no. That isn’t enough time for three countries unless you just want to be traveling from here to there and not experience much. I’m sorry if that sounds harsh, it’s just not what I would do.

You aren't serious are you? You need at least a week for each country (and don't forget to allw for a day to recover from jet lag at the start and travel time between the three different places... )You could possibly do England and Scotland in two weeks but even them you are short changing both places.

The other possibility is to spend 4-5 nights each in Dublin, Edinburgh and London but you won't see much else and not much oif the countryside.

No, two weeks is not enough. All of these places have a lot of history, therefore, a lot of sights to see, and a lot of ground to cover. With only two weeks, the best you could do would be a couple quick stops in large cities in each country and the rest of your time would be spent getting from one spot to the next. If you were to start in London and end in Edinburgh or Glasgow you could get England and Scotland into one trip, but you wouldn’t see much of the best of Scotland which is quite a bit further north in the highlands. I can understand wanting to see al three, but they are all best done as individual trips.