Between evening appointments I decided to pull over and have some me time, reading an article in my favourite broadsheet newspaper, and enjoying some tea. My eyes wandered from the paragraphs to the windscreen and the darkness beyond. Stepping out of the car, enjoying the cold night air, I marvelled at the beauty of the stars, watching for satellites far above me, I tried to imagine what early humans felt when they witnessed shooting stars. As I acknowledged the familiar outline of stars in the Plough, my vision picked up a movement between the stars, I though it was an aircraft, but this one had no port or starboard lights, no flashing beacons, and no familiar outline, and most significantly , no sound. My eyes to in the scene rechecking with co ordinates onthe ground to give me a sense of its altitude and speed, and also its direction of travel. I deduced that as the road I was on was above sea level, and I was observing at an angle of less than 45 degrees, that the "object" was at less than 1,000 feet, I observed it for over 10 seconds in which time it moved from my far left to my far right, and at a NNE heading, and moving approximatley 80-150mph . My disbelief continued as I realised that the "object" was triangular, and very sharp in appearence with red lights along its border. As I obsereved I made notes of its behaviour, noting that it was turning on its nose to tail axis in that as one "wing" raised, the other lowered. And most significantly, it made no sound whatsoever. Having operated with american Stealth aircaft during the gulf war, I knew this was no Stealth fighter, though I also noted this was the size of a Stealth bomber or bigger, though to the best of my knowledge the bomber had big noisey engines, and is more V shaped than a full triangle. I have never seen anything like this, and later drving around other locations in the vicinity I felt that the craft flew directly over the city I was in, and must have been seen by someone else, becauze this thing was big. And in my opinion, by the way it was behaving , it was using its flight path to observe features of the land below. I do not think this was an alien space craft, but I do beleive that this is more probably a form of aircraft to replace the aging U2. I lost sight of it as it flew off to my far right over the brow of a hill, I also lost sight of it as it blended in with the dark sky.