Thank you all for the great response.
Geoff: Yes it was shot in RAW and I played around with the white balance for ages but just couldn't get a good compromise. I ended up keeping the "As Shot" setting because other things I tried caused some really weird colour casts in various areas. I know it looks off but this is pretty close to what it loked like at the time. The slide is actually yellow, the spiral climbing apparatus beside it is actually white and the glowing night sky is reflecting the orange street lighting from the housing estate behind. On top of that, I think the torch I was using had a slightly orange colour to it as well so there was all kinds of evil afoot as far as colouring was concerned!
BBJ: Thanks John - pleased you like it. It was certainly a bit spooky down there..
Marco: I had made sure I parked my car under a light and was keeping a very keen eye (and ear) out the whole time! It's amazing how you hear every tiny little sound when you're alone in the dark with a lot of expensive camera gear. Never saw another living soul, though there may have been some unliving ones around...
Owen: Thanks for the advice - I'll certainly take note. The full sized version is, as you expected, quite noisy. I was pretty well guessing the settings on this one, thinking that a nice wide aperture would give me the best result given the cheap little torch I had. Looking at it now though, I needn't have been so cautious. I'l probably try using the in-camera Noise Reduction next time too. It's worked well for me in the past with some 30 minute star trail exposures.
Doug: Grab your camera, tripod and torch and just get out there and do it! I love this style of shot and want to do a lot more of it too. Good luck.
