How cool... I have been to the UK once, but I want to get back over in that area and spend a week or so in Ireland. That would be awesome.
Your #2 and 4 shots are my favorites here. In #1, lot's of potential with that one, but it's coming off the weakest here to me. I would crop out that white rock at the bottom, it's distracting. And then sky feels a bit too hot and bright still. I would use a layer mask and pull down the exposure up in the sky a bit more.
Here is your crop, Jim, I tried to balance the image by removing some of the sky as well as the foreground rock.
I also moved the black point in and reduced the colour temperature to reduce some of the "glow" that Sunny commented on.
