(#1 - probably lack of light, but it needs a bit of contrast. Maybe even some less White Balance. The castle is too close to 18% gray.
#2 - Nice, very nice. You didn't happen to do one with a very long exposure did you? I think the light pouring and over exposing through the windows would have been an interesting shot.)
A).Hey thanks for the comments. In pic number 2 i had to hand hold the camera, no chance of tripod being used, not suitable/no room. 
(I have left the castle untouched (paste a copy of the original onto my edits), darken the sky, and brighen the grass (curves,with the green channel a bit higher, and +20% saturation). Iddealy, this is supposed to give the impression of a ray of light below a stormy sky...
What do you think ?)
B). Thank you for spending the time adjusting the picture. Looks a lot better, really pleased with a bit more detail from the sky and the grass is much better.
Im still getting to grips with PS. I think i overdo it sometimes, so i tend to err on the side of not doing too much! 
Canon 7D, Canon 400D, Canon G10, Canon G5X, Canon 24 - 70 lens, Canon 50 1.8 lens, Canon 1.4, Tamron 18 - 270, Canon 100mm Macro, Canon 10 - 22 Wide angle, Canon 90 - 300mm, Sigma 24 - 200 2.8, Canon 430EX Speedlight MK 2. Photoshop Elements 12, Lightroom 5, LR Time-lapse 4.