Orange of light in the night sky: UFO? or perfectly reasonable explanation?

At approx' 02:20 hours on the 26th Sept 2010, my husband and I saw YET another orange glowing ball of light 'thing' travelling in a south westerly direction. We have seen a number of these now since new years eve of 2009, and they're bugging the hell out of us. They travel in a straight line, are soundless, and go faster than any plane we have ever seen. No sooner do you see the damned thing, than it travels so fast there is literally no time to grab a camera. We live in Dunstable in Bedfordshire England, a few miles from Luton Airport, and so are used to seeing and hearing lots of commercial aircraft and even the local police helicopters fly over our house. We know others have seen them, but does anybody know what they are? We've tried all the logical explanations we can think of. Remember, no sound, straight level flight path, no flashing lights or distinguishable shape to them, just a glowing ball of flame coloured light and incredibly fast. Also, tonight there is no wind, so please people, don't suggest chinese lanterns. If it was a chinese lantern, it would have to have a rocket at its rear end to make it travel so fast, and it would have to be an incredibly intelligent lantern to never deviate from its straight level path. Sensible answers only please. Thanks.