Hi Nick,
The Lake District is a beautiful place this time of year for taking photographs. I was up there myself only three weeks ago and I have a few of the shots I took whilst I was there in my gallery.
As for your images, the first two need the horizon straightening up as it looks as though it's higher on the left and it is on the right. In the first image, it almost looks as though you've tried to overlay one image over another and then deleted the foreground from the top layer to reveal those pebbles in the foreground. It looks like that because where the reflections of the mountain tops finish the pebbles start and it looks as though you've cut around them to reveal the foreground from another shot to the eye.
Your second shot would have looked so much better with a more interesting sky to help add a bit more drama to it.
I prefer your third shot out of the three, though I would have edited it slightly differently myself. I don't know how knowledgeable you are about editing, but this shot seems to have a bit of a blue colour cast to it that could be improved with some careful adjustment.
Now if you'd like to add to your existing editing skills I'd recommend you attend a workshop with Geoff Powell. He's runs workshops from his base in Carlisle from October to April and I can personally recommend how good they are. As I mentioned I was in the Lake District myself a few weeks ago, on one of his courses, which has improved my understanding of the whole process of photography, from deciding a location and theme through to printing the final images. You can find out more by clicking
here and it will take you directly to his website.