Thanks heaps guys for your comments.
Paul- yep you're not alone mate, Don't tell Striker though he'll hit the roof when he finds out how long I took to process these.
The grain is also there in the original too, it's my processing and the fact that it was a warm summer night. Ideally, I've read somewhere to switch off the preview screen and allow the camera to cool down between exposures, even as much as the exposure itself to minimise noise.
Scott- Yes I was using in camera NR but I plan to start using Flats and Darks too next time, I'm still learning but it's awesome to see some results finally.
Thanks Robby, Mike and Robin, cheers.
Robin I'll swap you for some of your fantastic shots, OK?