Nice job Baz. The sunset one is the best for sure.

Looking at the bottom 2 pics, your sensor needs a clean. Lots of dust spots. Either try a blower or get some sensor swabs and cleaning fluid. Check the mirror first though, it may be on there. If it is, you can clean that with either an optical cloth or a clean microfibre.

If you do need to get swabs and fluid, don't scrimp on them. A rough pad will leave you in a bad place. Once cleaned though, periodic cleaning with the blower should do the trick.