Well thanks for your help. I'll have to try that out tonight as it is sunny at the moment. Regarding the WB. When I meant I knew how to set it, I meant I knew how to configure it and change the values, not that I knew how to set it correctly, which I don't. I've always had problems with WB because I never really ever bothered to set it properly and learn how to use it. I've use Auto and it's been fine on that mostly.
I don't have any other pictures from the same one as the blue picture. I think I deleted the rest, but I'll check later. I do see some red on it, but still nowhere near as much as the ones I took the the day before yesterday and yesterday.
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In answer to the original question, it is because of the street lights. They come up at a fair distance on long exposure. Whenever I'm in the middle of no-where i like to take advantage and get some decent photos without the extra light. The reason the second photo is not as orange/red is because its framed better on the sky and no the houses which reflect the red/orange light. 
