2 dark grey craft, no sound, no lights, moving very fast across the sky.There had been news of a meteor shower coming down over England, so i had gone outside at approximately 22:30 to see if i could see any. I had sat in a chair looking up into the sky, and had seen a few coming through the atmosphere. I had seen a few passenger jets go over, and noticed something moving to my left, i looked up and saw 2 dark grey objects, which i thought at first was a meteor breaking up. So i looked closer, i noticed that they werent meteors as they werent burning up. It was 2 UFO's, they looked triangular, although it was hard to see as they were dark grey against a black sky. The 2 objects were moving close to each other, occasionally moving apart, or one infront of the other, they were travelling from west to east at a very fast speed. I thought they may have been fighter jets, but there was no light from the rear as you would expect. They passed over head and had gone out of my vision in about 6 seconds, i listened out for any sounds that might tell if they were jets, but they were completly silent. So they must have been using propulsion technology that doesnt involve burning fuel as there was no sound, or no light from the craft. To me they looked af if they were travelling at about 6000ft, but as i dont know the exact size of the craft, i cant be sure, but they were moving very fast to have gone across the sky and out of my view in around 6 seconds.